영어 모의고사 (자동 편성)

After a strenuous workout, muscle fibers experience thousands of microscopic tears, and the body immediately begins a repair process ① that ultimately makes the muscle stronger than it was before. This repair depends heavily on amino acids, the building blocks that protein ② supplying, which is why sports scientists recommend consuming protein within a couple of hours after training. Waiting too long to eat can slow recovery, since a muscle's sensitivity to amino acids gradually ③ declines once that window closes. Many athletes assume that eating an enormous quantity of protein in a single sitting will speed up this process, but the body can only use a limited amount at once; the rest is simply ④ burned for energy or stored as fat. For this reason, nutritionists generally advise ⑤ spreading moderate portions of protein evenly across several meals throughout the day rather than saving it all for one large post-workout meal.

Years ago, a small shoe company ①struggled to compete with larger, well-funded rivals in the market. One day, the founder decided to share the story behind the company: how her grandfather had once repaired shoes for factory workers ②who could not afford new pairs. Surprisingly, customers started responding not just to the shoes themselves but to the values the story represented. Sales slowly increased as people felt they ③was supporting something meaningful rather than simply buying a product. Other companies noticed this shift and began crafting their own narratives, ④hoping to create similar emotional connections. Eventually, the founder realized that a compelling story, ⑤told honestly, could turn ordinary customers into loyal supporters.

Mira had lived in a coastal village since birth, ①watching the tide creep closer to her family's doorstep every year. When the sea finally swallowed the rice paddies that ②had fed her village for generations, her parents decided that staying was no longer possible. Together with many neighbors, they packed what little they could carry and moved inland, becoming what experts now ③calls climate migrants, people forced to abandon their homes because of rising seas, droughts, or other disasters. This term, rarely used a decade ago, has become increasingly common as extreme weather ④displaces communities worldwide. Mira missed her old house terribly, yet she slowly began to build a new life in the crowded city, learning to adapt just as her ancestors once had. International organizations, however, still struggle to agree on how ⑤to protect people like her, since climate migrants are not officially recognized as refugees under current law.

When people discuss climate change, they often focus only on rising temperatures or melting ice, ①**treating** it as a purely scientific issue. However, the concept of climate justice reminds us that the causes and consequences of climate change are ②**distributed** unevenly across the globe. Wealthy, industrialized nations have historically released the largest share of greenhouse gases while building their economies, yet developing nations, ③**which contributed** comparatively little, frequently suffer the most severe droughts and floods. This gap between responsibility and suffering ④**raises** a serious ethical question that science alone cannot answer. For example, a farming community in a low-income country may lose its entire harvest to an unusual flood, even though its members have never owned a car or ⑤**flying** on a plane. Therefore, tackling climate change requires more than new technology; it demands fair policies supporting the very communities least responsible for causing the crisis.

Melatonin is a hormone produced by a small gland deep within the brain, and its release follows a remarkably predictable daily pattern. Levels stay low throughout the bright hours of the day, begin rising in the evening as darkness falls, peak in the middle of the night, and then decline again as morning approaches. This rhythm is controlled primarily by light: specialized cells in the eye detect brightness and send signals that either permit or suppress melatonin production, which is why exposure to bright screens late at night can delay its release and make falling asleep more difficult. Unlike some hormones that directly cause the body to perform a task, _______________, preparing various systems to shift into a lower-energy state. Because of this signaling role, taking melatonin supplements at the wrong time can shift a person's internal clock in the opposite direction from what was intended.

Imagine two factories making the same product: one in a country with strict carbon rules, and one in a country with almost none. The factory facing stricter rules often spends more, which can make its goods pricier than those made elsewhere. To fix this imbalance, some governments have introduced the carbon border adjustment mechanism, a policy charging imported goods a fee based on how much carbon was released while producing them. Supporters argue that the system _______________. However, critics claim it unfairly burdens developing countries, which often lack money to modernize factories quickly. For example, a small exporter in a poorer nation might struggle to pay the added charge, though it contributes little to global emissions. Still, if wealthier nations pair the policy with technical support, it could become a genuinely fair tool for cutting emissions worldwide.

Smartphones, tablets, and computer screens all emit a significant amount of blue light, a short-wavelength light that our eyes are especially sensitive to. (A) At night, however, the same wavelength can interfere with the body's natural preparation for sleep by suppressing the release of melatonin. (B) During the day, exposure to blue light from the sun helps keep us alert and mentally sharp, which is generally beneficial. (C) For this reason, some devices now offer a night mode that shifts the display toward warmer tones, though sleep researchers still recommend limiting screen use before bedtime.

Researchers who study teenagers have found a strong link between how well students sleep and how well they perform in school. (A) Students who sleep fewer than seven hours a night tend to score lower on tests of memory and attention than those who sleep eight or nine hours, even when the two groups study for the same number of hours. (B) One explanation is that sleep plays an active role in learning: during certain stages of sleep, the brain replays and strengthens information encountered during the day, converting fragile short-term memories into more durable long-term ones. (C) When sleep is cut short, this consolidation process is interrupted before it can finish, so material that seemed well understood the night before often feels unfamiliar the next morning. For this reason, some schools have begun rethinking early start times, reasoning that an extra hour of sleep might do more for test scores than an extra hour of studying ever could.

Amateur athletes often credit this kind of guidance with helping them train more consistently without pushing their bodies too hard. A smartwatch strapped to a runner's wrist can now do far more than simply count steps; it monitors heart rate variability, running form, and recovery time, then uses that data to suggest a training plan tailored to the individual rather than a generic weekly schedule. ( ① ) When the device detects signs of overtraining, such as an unusually high resting heart rate several mornings in a row, it may recommend a lighter workout or an extra rest day before fatigue turns into an actual injury. ( ② ) Sports scientists note an important caveat, however. ( ③ ) A wrist-based sensor cannot fully capture the same physiological detail available in a professional lab. ( ④ ) Its suggestions should be treated as a helpful guideline rather than an infallible medical judgment, particularly for anyone managing a chronic health condition. ( ⑤ )

Athletes competing in hot, humid conditions face a particularly difficult balance, because sweating heavily to stay cool simultaneously depletes the very fluids needed to sustain performance. Even a modest level of dehydration, as little as two percent of body weight lost through sweat, can measurably reduce an athlete's endurance and cognitive sharpness during competition. ( ① ) As fluid levels drop, blood volume decreases, forcing the heart to work harder to deliver the same amount of oxygen to working muscles, which accelerates fatigue. ( ② ) Dehydration also impairs the body's ability to regulate its own temperature, since sweating is the primary mechanism for releasing excess heat during intense exercise. ( ③ ) Simply drinking large amounts of plain water is not always sufficient, however, since heavy sweating also flushes out sodium and other electrolytes essential for proper muscle function. ( ④ ) For this reason, sports scientists generally recommend a hydration strategy that replaces both fluid and electrolytes, tailored to an individual athlete's sweat rate and the specific conditions of the event. ( ⑤ )