📐 SAT Practice Test #71 복습 드릴

Ammonia serves as a critical ingredient in agricultural fertilizers and ranks second only to sulfuric acid as the most produced chemical globally, with over 145 million tons produced each year. Despite its structural simplicity, consisting of a single nitrogen atom and three hydrogen atoms, its production is unexpectedly challenging and ranks among the most energy-demanding processes on earth.

Following the guidelines of the inclusive education framework, schools and universities have reformed curricula to integrate diverse perspectives into their academic programs. This approach is notably demonstrated by the University of Cape Town, which has not failed to ______ this initiative by revising history courses to better reflect a broader range of cultural viewpoints.

In negotiations over water allocations between Israel and Syria, both parties use the Water Allocation System tool, which allows users to evaluate the consequences of various proposed scenarios by taking into account the economic, social, and environmental impacts. Each side ______ its respective claims based on ownership rights and international law, often using different principles.

Over the past two hundred years, humans have significantly increased their energy capture by harnessing the power of ancient sunlight stored as fossil fuels. Chiefly sourced from extensive reserves of coal, gas, and oil that have lain beneath the surface since the Carboniferous Period, dating back 300 to 360 million years, exploiting fossil fuels has ignited an energy revolution, catalyzing profound changes in societies and their underlying values.

Text 1

Recent scientific studies reinforce the substantial evidence linking students' behavior, focus, and intelligence to their nutritional intake. School cafeteria food has come under scrutiny, revealing poor dietary conditions. Experts suggest many schools fail to meet children's unique nutritional needs due to ignorance rather than budgetary limits, which poses serious issues for growing children’s health and development.

Text 2

School administrators are under pressure from parents and health officials to provide more nutritious lunch options, but they also face economic competition from fast-food chains that attract students. Although parents may resist the influence of these chains, schools struggle with financial constraints, as running an unprofitable cafeteria can become a substantial drain on their budget.

The following text is adapted from a speech delivered by Ronald Reagan in 1987 that addresses the situation in Germany. 

Four decades ago, there was rubble, but today, in West Berlin, there is the greatest industrial output of any city in Germany: busy office blocks, fine homes and apartments, proud avenues, and the spreading lawns of parkland. Where a city’s culture seemed to have been destroyed, today, there are two great universities, orchestras and an opera, countless theaters, and museums. Where there was want, today there’s abundance—food, clothing, automobiles... From devastation from utter ruin, you Berliners have, in freedom, rebuilt a city that once again ranks as one of the greatest on earth. Now the Soviets may have had other plans.

Acrophobia, a debilitating fear of heights, significantly disrupts daily life and hinders traditional exposure therapy due to logistical constraints. Virtual Reality (VR) technology offers a promising alternative, creating a safe and controlled environment for therapeutic exposure. Consider a 32-year-old woman with severe acrophobia whose daily activities, like climbing stairs or crossing bridges, trigger anxiety. VR therapy allows for a graded exposure paradigm. Patients like this woman can begin in low-risk virtual environments, systematically progressing toward scenarios mirroring their phobias. This measured approach facilitates habituation to anxiety-provoking stimuli in a safe and controlled setting, potentially leading to reduced phobic responses.

The development of new medical implants, particularly artificial heart devices, faces significant challenges due to insufficient human testing. Although engineering design is not the primary obstacle, the success of heart implants varies depending on factors such as the patient’s age, overall health, and the quality of postoperative care. While some devices have successfully supported patients awaiting transplants, others have failed, highlighting the need for greater experiential knowledge in coronary care. The current gap lies not in the innovation of new devices but in understanding how these devices interact with human physiology over time.

Although not quite as famously endemic of the Everglades as the American crocodile, the far more endearing manatee is perhaps more symbolic of the unique wildlife found in this vast tropical swamp. In particular, the manatees found in the Florida Everglades, though occasionally observed in unprotected waterways in the northern regions of the state, are rarely found anywhere else in the country. This manatee concentration in southern Florida is not surprising, given the fact that swimming in water even a single degree colder than 68° Fahrenheit can be fatal to these bulbous, slow, and exceedingly fragile creatures.

Genetically modified organisms (GMOs) provide substantial economic advantages to farmers, increasing crop yields while reducing dependence on costly pesticides. Based on research by agricultural economist Matin Qaim, from 1996 to 2014, GM crops led to a 21.6% rise in crop yields and significant decreases in pesticide usage and cost, by 36.9% and 39.2%, respectively. Also, ______ 

Critics often overlook the positive aspects of comic books, especially their role as an underground, non-conforming outlet for children. Kids are overwhelmed with tasks labeled as "education." They wake up as early as their parents, work without social breaks, and follow strict schedules until three o'clock, always at someone else’s convenience. Lunch is often something as unappealing as waxed milk. Faced with these pressures, it’s no surprise that children seek an escape, a hidden refuge from adult oversight where they can maintain their sanity. In the past, comic books offered that essential mental sanctuary from the daily grind.

Tim E. Grayson, a seasoned labor organizer with over three decades of experience, served as the president of one of the country’s largest and most influential labor unions. According to the National Labor Relations Institute (NLRI), Grayson—known for his strategic acumen and ability to navigate complex negotiations—is an excellent choice to chair the new council on business-labor relations.

Evolving over millions of years, trilobites ______ with a hard exoskeleton, a key feature of this group of marine arthropods. Some species had compound eyes and were good swimmers, while others had flat bodies for crawling along the ocean floor, using special limbs to feed and avoid predators.

The whispering roots of trees, deeply intertwined with mycorrhizal fungi, create a vast underground network. The fungus, which benefits from the plant’s sugars, ______ its filaments through the soil, enhancing the tree’s ability to absorb water and nutrients, ultimately supporting the entire ecosystem in ways unseen above ground.

The placebo effect occurs when patients experience real symptom relief after taking a treatment with no active ingredients because they believe it will work. This demonstrates how ______

The human gut microbiome is crucial for digestion, immune function, and even regulating mood. A healthy balance of bacteria helps keep the body functioning well. However, disruptions in the microbiome have been linked to conditions like inflammatory bowel disease, ______ the importance of maintaining a balanced gut environment.

Many individuals choose part-time work to gain more leisure time, accepting a lower income in exchange for a better work-life balance. Businesses, in turn, may assess whether offering flexible work options increases ______ these arrangements can lower overhead costs and improve employee retention.

To explore how shape affects stiffness, one can create simple models by rolling paper into shapes like round or teardrop tubes. Observing how these models bend and twist reveals how shape influences stiffness. This works because paper is an isotropic material, meaning it has the same strength and stiffness regardless of the measurement direction. ______ this method is basic and doesn’t capture more complex aspects, such as varying stiffness along the tube’s length. However, it still effectively demonstrates the importance of shape in structural design.

A study was conducted to examine how students' academic status and identification with academics influence their grade point averages (GPA). Academic status was coded based on whether students were dismissed, on probation, in good standing, or received honors. The study aimed to assess how closely students' self-esteem was tied to their academic outcomes, which required a specific measure of Identification with Academics. ______ existing measures did not adequately capture this distinct concept. As a result, a new scale was developed to measure Identification with Academics.

Caribou have evolved to have a very short calving period, the time when they give birth to their young. This short period is an adaptation to the brief Arctic summer when conditions are most favorable for the survival of newborn calves. ______ wildebeests have evolved short calving periods as a way to cope with predators. Most wildebeests give birth within a very short period, creating a concentrated calving season that produces a large number of calves all at once, overwhelming predators like hyenas, lions, and cheetahs.

While researching a topic, a student has taken the following notes:

• The Epic of Gilgamesh is an ancient Mesopotamian poem that explores themes of mortality, friendship, and the search for meaning.
• Gilgamesh's quest for immortality is a central theme that resonates with other epic works, such as Homer’s Odyssey and Virgil’s Aeneid.
• The story of Gilgamesh has influenced modern literature and media, including novels, films, and video games.
• In The Epic of Gilgamesh, the protagonist's journey ultimately leads him to accept the inevitability of death.
• Homer's Odyssey features a similar journey, with Odysseus searching for home and self-understanding, though the focus is less on mortality.

While researching a topic, a student has taken the following notes:

• Superstar athletes often command significantly higher salaries than their teammates, even if they play the same sport and position.
• Their higher pay is not necessarily based on performance alone but on their ability to generate revenue for the team.
• Revenue can come from increased ticket sales, merchandise, endorsements, and overall brand visibility that superstar athletes bring to their teams.
• For example, a star player might have a lucrative endorsement deal that also increases demand for team merchandise.
• Teams are willing to pay superstar athletes more because their presence can drive profits beyond just winning games.

Given the recent rise in global temperatures, many marine species have begun to exhibit unexpected acclimatization. Scientists have noted that certain fish populations are now thriving in waters previously deemed too warm. These changes in behavior and habitat preferences underscore the species' ______ to changing environmental conditions.

The Voyager Golden Records, which were sent into space aboard the Voyager spacecrafts, are a prime example of _______ in the history of space exploration. These records were designed to communicate the story of our world to extraterrestrials and included sounds, images, and greetings in various languages. Considering the immense challenge of creating a message meant to be understood by potential alien civilizations, this ambitious endeavor can be appreciated.

In modern urban planning, green spaces are crucial for maintaining ecological balance. A city with __________ green areas provides its residents with cleaner air and natural beauty, while a lack of such spaces can lead to a stark, concrete-dominated environment.

The mobile gaming industry has seen a significant upsurge in recent years. With millions playing games on their smartphones daily, revenue hit record numbers in 2020. Industry experts __________ that this trend will continue, with revenues possibly tripling by the end of the decade.

In the early 20th century, environmental conservation efforts gained momentum, with activists advocating for sustainable practices. This __________ initiative included campaigns to plant trees, promote recycling, and enforce laws against industrial pollution, aiming to preserve natural habitats for future generations.

The technique of genetically modifying crops is often viewed as ______ because of potential health risks and environmental concerns. However, scientist Elena Petrova has pioneered a safer method of genetic editing that minimizes unintended effects on surrounding ecosystems and enhances crop resistance to pests.

The process of making a mail shirt was extremely time-consuming in pre-industrial times. Each of the thousands of links that formed a full suit or harness had to be cut by hand from coils of wire. The ends of each link were flattened, drilled with small holes, and then linked together in the garment before being riveted shut. By adjusting the pattern of how the links interlocked, a skilled armorer could resize the metal garment and even "knit" more intricate items, such as sleeves, mittens, hoods, and other complex shapes.

In 1980, Luis Alvarez, winner of the Nobel Prize in Physics, suggested a novel explanation: cosmic extinction. According to Alvarez and his geologist son Walter, a huge meteor crashed into the earth’s surface 65 million years ago, sending up a massive cloud of dust and rock particles. The cloud blocked out sunlight for a period of months or even years, disrupting plant photosynthesis and, by extension, the global food chain. The lack of vegetation, coupled with a significant drop in temperature, resulted in the extinction of the dinosaurs.

Approximately 25 years ago, it was discovered that the Universe is not only expanding but doing so at an accelerating rate. This acceleration has been ongoing for the past 5,000 million years, causing galaxies to move away from each other. Despite confirming this phenomenon through various cosmological observations, its cause remains unexplained. However, it is known that the driving force must be a substance or fluid that counteracts gravity and is dispersed throughout space-time. In 1999, physicist Michael Turner coined the term "dark energy" to describe this mysterious component essential for explaining the Universe's accelerating expansion. Without dark energy, the expansion would slow, eventually causing the Universe to contract.

Architect Pablo Rivera is known for incorporating elements of modernist architecture into his designs for public buildings. For his design of the City Hall in Santiago (2010), Rivera drew inspiration from the renowned architect Le Corbusier, especially Le Corbusier’s use of geometric forms and open spaces. The design of the City Hall reflects this influence, particularly in its minimalist structure and extensive use of concrete and glass. Rivera's architectural approach also highlights a connection to Le Corbusier’s philosophy, emphasizing functionality and simplicity—an idea Rivera reinforces through his focus on clean lines and uncluttered spaces in his design.

The Global Tiger Conservation Initiative has been working to protect tigers from extinction since 2005. This program focuses on breeding tigers in captivity and releasing them into the wild to help rebuild wild populations. By the early 2010s, the captive population began to stabilize as more tigers were successfully reintroduced. Though tigers remain critically endangered, experts argue that the program has made measurable progress.

Rock gardens are an appealing option for gardeners with less-than-ideal growing conditions, such as hilly, stony, or awkwardly arranged plots, where traditional garden plants may struggle to survive. Alpine plants like gentians, edelweiss, and stonecrops thrive in the rocky, rugged soil characteristic of mountainous regions, making them suitable for rock gardens. These plants not only survive but also flourish, even in challenging environments, due to their ability to adapt to such soils. Additionally, the visual beauty of rock gardens stems from the aesthetic arrangement of both rocks and plants, providing a unique appeal where typical garden designs may not be feasible.

Marine conservationists often argue that fishing practices (catching fish for consumption and commercial purposes) are in direct conflict with marine conservation efforts. However, a large-scale study on marine ecosystem management, covering 300,000 square kilometers of ocean around the Great Barrier Reef, challenges this view. The study found that areas where controlled fishing (limiting the number of fish caught) was allowed showed greater biodiversity and healthier ecosystems compared to areas with a complete ban on fishing. These findings suggest that ______

Cro-Magnon spelunkers were like modern humans, whereas their predecessors, the Neanderthals—like modern apes—rarely penetrated the caves beyond the zone of sunlight. We think of cave art as made by “cavemen,” a term that immediately evokes images of hairy brutes partly draped in animal furs. In fact, the Cro-Magnons lived far from caves, as well as within them; we think of them as cavemen only because the garbage they left in caves is more likely to have been preserved than other artifacts. From their garbage, burials, and art, we know that they had needles, buttons, sewn clothing, and parkas and were probably as warmly dressed as modern Eskimos.

A group of psychologists aimed to explore how perceptions of difficulty could be influenced by prior tasks. They began their study by assigning participants an initial puzzle to solve, with some receiving an easy puzzle and others a difficult one. Following this, all participants were given the same second puzzle and asked to rate its difficulty. Participants who had first encountered the difficult puzzle rated the second puzzle as easier compared to those who started with the easy one. The psychologists concluded that perceptions of task difficulty could be shaped by ______

British colonialism profoundly shaped English literature, as in Joseph Conrad's Heart of Darkness (1899) and Rudyard Kipling's Kim (1901). Conrad critiques the brutality of colonialism in the Congo, exposing its exploitation and racism. At the same time, Kipling's Kim ______ on the British presence in India through an orphan's coming-of-age journey.

A genetic algorithm, inspired by natural selection, can optimize delivery routes for a logistics ______ it helps to find the most efficient paths for trucks, reducing fuel consumption and delivery times. By simulating evolution, the algorithm tests different route combinations and gradually selects the best solutions for faster, more cost-effective deliveries.

The Cult of Isis, having emerged during the decline of native Egyptian religion and spreading throughout the Greco-Roman world, ______ followers with its promise of personal salvation through the goddess’s universal roles. Revered as a mother, healer, and protector, the goddess Isis remained popular, symbolizing spiritual renewal and eternal life.

In the future, people will likely choose more expensive phones with unnecessary features because people rely too heavily on the first piece of information they encounter when making decisions. Similarly, they ______ unhealthy snacks due to the availability bias, selecting what is readily available instead of making healthier choices.

4D printing technology introduces materials that can change over time, offering innovative applications. For instance, 4D-printed ______ make them ideal for drug delivery, as they release medication at a controlled rate while degrading. This time-sensitive mechanism could revolutionize how treatments are administered in medical practices.

The conflict over the Kashmir region between India and Pakistan persists largely because of its strategic location and valuable water resources in the Himalayas. Both nations seek to control the area ______ access to these resources and to strengthen their geopolitical influence in the region for future stability.

Critics say that President Bush often reacted to foreign policy events rather than taking the lead, pointing to his slow response to the independence movements in the Baltics and the fall of the Soviet Union. ______ they mention his difficulty dealing with complicated issues after the Cold War, like the conflict in Yugoslavia, where leaders had to choose between stopping Serbian violence and staying out of Bosnia's civil war. Bush’s inability to clearly define America’s role further weakened trust in his foreign policy.

Matt Kemp, a professional baseball player for the Los Angeles Dodgers, underwent surgery on his left shoulder after sustaining an injury during a game. Kemp, an All-Star outfielder, tore the labrum in his shoulder when he crashed into the center-field wall at Coors Field. Despite the injury, Kemp played through the pain for the remainder of the season. ______ he underwent surgery, which took him several months to recover from.

Upon discovering massively open online courses (MOOCs), the instructor recognized the potential to utilize their lecture materials to "flip" classes at Vanderbilt University by assigning students to view lectures in advance, dedicating class time to interactive activities. _______ there was initial hesitation to use content from other institutions due to concerns about the perception of outsourcing.

J.K. Rowling's 1997 novel Harry Potter and the Philosopher's Stone follows the journey of Harry Potter and his friends as they navigate their first year at Hogwarts School of Witchcraft and Wizardry. Harry, a young wizard, faces challenges both in and outside of school. ______ Hermione, his intelligent and determined friend, supports him along the way while pursuing her academic goals. However, despite her knowledge, she too struggles to fit in at Hogwarts.

While researching a topic, a student has taken the following notes:

• Dream of the Red Chamber is one of China's four great classical novels.
• Written by Cao Xueqin in the 18th century, the novel offers a rich commentary on Qing Dynasty society.
• The novel follows the fortunes and decline of the noble Jia family, interweaving themes of love, loss, and the fragility of wealth.
• It is known for its complex characters and detailed portrayal of family life and the hierarchical structure of Chinese society.
• Many scholars regard Dream of the Red Chamber as one of the greatest works in Chinese literature.
• Cao Xueqin, the author of Dream of the Red Chamber, came from a prominent family that fell from favor during the Qing Dynasty, which likely influenced the novel's themes of decline and loss.

While researching a topic, a student has taken the following notes:

• CRISPR is a gene-editing technology that allows scientists to alter DNA sequences in living organisms.
• Scientists are exploring the use of CRISPR to potentially cure genetic diseases by correcting faulty genes in patients' cells.
• One area of interest is using CRISPR to treat cystic fibrosis, a condition caused by mutations in the CFTR gene.
• CRISPR’s ability to specifically target and edit faulty genes could provide long-term relief by addressing the root cause of genetic diseases.
• Some challenges include the potential for off-target effects, where CRISPR might accidentally edit the wrong part of the genome.

Wang Anshi was a prominent Chinese statesman and reformer during the Northern Song dynasty, known for his controversial New Policies, which aimed to strengthen the state through economic and military reforms. Despite facing significant opposition from Confucian scholars who criticized his policies as economically catastrophic, Wang's ideas have been ______ by the People's Republic of China, which elevates his legacy as a champion of state-led economic intervention.

Non-cost-based pricing in the electricity transmission industry, which refers to a pricing strategy where the price of a product or service is not directly tied to the actual cost of production, can significantly ______ the efficiency of the system. Transmission facilities are crucial for delivering power across regions, and prices that don’t reflect actual costs can lead to either an overuse or underuse of these facilities.

The following text is adapted from Willa Cather’s 1905 novel Paul’s Case. 

It was Paul’s afternoon to appear before the faculty of the Pittsburgh High School to account for his various misdemeanors. He had been suspended a week ago, and his father had called the Principal’s office and confessed his perplexity about his son. Paul entered the faculty room suave and smiling.

To effectively address racial health disparities, it is crucial to ______ these issues within the broader framework of systemic racism rather than reducing them to biological differences. By incorporating critical race theory into medical education, educators can better frame how racism, rather than race itself, drives health inequities, fostering a more comprehensive understanding of these disparities.

David Brooks' book The Social Animal explores how cognitive science reshapes our understanding of human behavior, exploring how different parts of the brain operate when we perceive, think, and desire. However, Brooks glosses over the field's uncertainties, such as the mind/body problem, which questions how brain activity adds up to a unified, conscious self.

The following text is adapted from Theodore Dreiser’s 1900 novel Sister Carrie. 

It was not often that she came to the play stirred to her heart’s core by actualities. To-day a low song of longing had been set singing in her heart by the finery, the merriment, the beauty she had seen. Oh, these women who had passed her by, hundreds and hundreds strong, who were they? Whence came the rich, elegant dresses, the astonishingly coloured buttons, the knick-knacks of silver and gold? Amid what elegancies of carved furniture, decorated walls, elaborate tapestries did they move? Where were their rich apartments, loaded with all that money could provide? In what stables champed these sleek, nervous horses and rested the gorgeous carriages?

The following text is adapted from Maurice Leblanc’s 1907 work, The Extraordinary Adventures of Arsene Lupin, Gentleman-Burglar. 

Arsène Lupin in our midst! the irresponsible burglar whose exploits had been narrated in all the newspapers during the past few months! the mysterious individual with whom Ganimard, our shrewdest detective, had been engaged in an implacable conflict amidst interesting and picturesque surroundings. Arsène Lupin, the eccentric gentleman who operates only in the chateaux and salons, and who, one night, entered the residence of Baron Schormann, but emerged empty-handed, leaving, however, his card on which he had scribbled these words: “Arsène Lupin, gentleman-burglar, will return when the furniture is genuine.” Arsène Lupin, the man of a thousand disguises: in turn a chauffeur, detective, bookmaker, Russian physician, Spanish bull-fighter, commercial traveler, robust youth, or decrepit old man.

The discovery of gold at Sutter's Mill in 1848 by James Marshall ignited a transformative wave across California, significantly altering its demographic composition, economic trajectory, and ecological equilibrium. This period, christened the Gold Rush, witnessed a meteoric rise in population as individuals from across the globe converged on the nascent goldfields. However, this diverse influx did not come without consequences. Social cohesion frayed, succumbing to escalating tensions and rampant lawlessness. Burgeoning mining camps, ill-equipped to handle the exponential population surge, became hotbeds of societal discord. The environmental toll exacted by the Gold Rush was equally devastating. Forests were ruthlessly felled to fuel mining operations, rivers became repositories for mercury-laden waste, and the delicate balance of local ecosystems was shattered.

The following text is excerpted from the 1970 novel Deliverance, written by James Dickey. 

I didn’t have much idea what good meant in the way of river water, but for it to seem good to Lewis it would have to meet some very definite standards. The way he went about things was strictly his own; that was mainly what he liked about doing them. He liked particularly to take some extremely specialized and difficult form of sport—usually one he could do by himself—and evolve a personal approach to it which he could then expound.

Text 1

In Moby Dick, Melville appears to test the public’s tolerance for his increasingly exaggerated and tedious works, producing volumes that lack natural wit, sentiment, and enthusiasm. His forced attempts at innovation and humor come across as clumsy and ineffective. The work is an ill-compounded mixture of romance and matter-of-facts, lacking coherence, with a style that repeatedly betrays the author’s struggles during composition.

Text 2

Many critics dismiss Moby Dick as a treatise on whaling due to its extensive factual content. However, Melville integrates these non-narrative sections to subtly advance the story. Melville needed to create a sense of personality and agency for a mute animal, and he addressed these challenges by educating the readers. His whaling experience and scientific research allowed him to include instructional chapters that illustrated the intelligence and majesty of these creatures.

Vanity Fair is an 1848 novel by W. M. Thackeray. In the novel, it is implied that the main reason Rebecca, the main character, considered Miss Pinkerton’s school to be a “prison” because she felt stifled by its strict conventions: ______

In the vast and often impenetrable expanses of the world's oceans, the humpback whale, known for its remarkable vocal repertoire, produces songs of extraordinary complexity, which, intertwined with patterns of repetition and variation, ______ the scientific community.

The viceroy butterfly, a species distinguished by its strikingly similar coloration to that of the toxic monarch butterfly, emerges as a quintessential example of Batesian mimicry—a phenomenon wherein the viceroy, lacking the toxic compounds of the monarch, nevertheless enjoys a reduction in predation due to its deceptive appearance. Central to this mimicry is the orange and black ______ ingrained in the learned behaviors of avian predators, elicits a conditioned aversion.

The intricate and multifaceted relationship between income and happiness has been a subject of considerable academic interest, with numerous studies, including those by Dr. Jitendra Prabhakar and Professor ______ to elucidate the extent to which financial resources contribute to overall well-being. While a positive correlation between income and happiness is frequently observed, this relationship, as noted by both Prabhakar and Adebayo, appears to exhibit diminishing returns beyond a certain threshold.

The deployment of self-driving cars, which integrate sophisticated algorithms and advanced sensor technologies to navigate complex environments autonomously, has engendered considerable excitement as well as concern regarding the safety and reliability of these ______ to the discourse on the safety of autonomous vehicles is the necessity of verifying that the software controlling these vehicles operates correctly in a multitude of situations: routine driving conditions or rare but critical edge cases both could pose significant safety risks.

The magnetar SGR 1806-20's intense magnetic field and episodic gamma-ray bursts, culminating in the astrophysical community's heightened attention, ______ to the release of the most powerful burst of X-rays ever detected from a celestial source, aside from the Sun, in 2004. Researchers' extensive analysis of data gathered from various space-based observatories has sought to elucidate the mechanisms underlying this extraordinary event, which is characterized by the emission of energy on a scale far exceeding that of typical stellar phenomena.

The phenomenon in which sugar pills, devoid of any pharmacologically active ingredients, elicit a measurable improvement in pain symptoms among certain patients—contingent upon their belief in the authenticity of the treatment—constitutes a compelling demonstration of the placebo effect. This psychosomatic response, in which the mere expectation of therapeutic benefit can precipitate the alleviation of symptoms, ______ the profound influence of cognitive processes on physiological outcomes.

To address the widening test score gaps, implementing structural reforms in K-12 education is essential to promote competition and drive innovation. Furthermore, the potential of affordable, high-quality online instruction and third-party certification presents an opportunity to revolutionize higher education and enhance accessibility. Early interventions during preschool years are vital for improving long-term outcomes for disadvantaged children. ______ the newly introduced educational reforms, in conjunction with policies that encourage work and entrepreneurship, can contribute to closing the achievement gap and advancing upward mobility.

Microchimerism, characterized by the presence of a small number of cells in one individual that originated from another, was identified in approximately 63% of the 59 women whose brain autopsies were examined. These cells, often male and presumably derived from previous pregnancies, were found to persist throughout the lifespan, including in a woman aged 94. Among the cohort, a reduced prevalence of microchimerism was observed in women with Alzheimer's disease. ______ researchers are investigating the potential association between microchimerism and neurological disorders, though the precise biological role of these cells within the brain remains to be elucidated.

During the 1850s, Spanish theater featured both political propaganda and a rising social consciousness in its plays, with authors like Sixto Camara and Pablo Avecilla addressing issues of class disparity and labor conditions. ______ the Teatro del Circo, one of Madrid's prominent theaters known for showcasing such plays, faced financial difficulties despite these developments and ultimately declared bankruptcy in 1858.

Big data science and analytics hold transformative potential, influencing academic research, social practices, and urban management. This technology is revolutionizing how smart and sustainable cities are planned and operated, especially amidst rapid urbanization. ______ data-driven urbanism has become the foundation for understanding and managing cities, as the intensification of datafication increasingly intertwines urban life with data.

While researching a topic, a student has taken the following notes:

• Penguins reduce up to 40% of the energy they expend by swimming in formation behind the leader.
• The mechanics of how this energy savings occurs have not always been fully understood.
• Marine biologist Dr. Omar Al-Farouq used underwater drones to analyze the effects of water currents on swimming penguins.
• The study showed that penguins are propelled forward by the flow created by the leading penguin’s movement.
• Dr. Al-Farouq determined that this forward push reduces water resistance on the following penguins by 120%.

While conducting research on climate change, a student took the following notes:

• Most, but not all, of the Earth's CO₂ emissions come from human activities such as burning fossil fuels.
• Environmental scientist Dr. Isabella Martinez from Stanford University questioned whether some CO₂ emissions were naturally occurring from deep-sea volcanic activity.
• In 2015, she analyzed satellite data from NASA's Aqua satellite.
• Aqua gathered data on atmospheric gases and emissions it encountered while orbiting Earth.
  
• Based on the Aqua data, Dr. Martinez confirmed her hypothesis that deep-sea volcanic activity is contributing to Earth's CO₂ levels.