영어 모의고사 (자동 편성)

Sleep apnea is a disorder in which breathing repeatedly stops and restarts during sleep, often because the muscles at the back of the throat relax too much and block the airway. Each pause can last from a few seconds to over a minute, and it may occur dozens of times in a single night without the sleeper ever ① waking up fully. Because these interruptions rarely produce a clear memory the next morning, many people remain ② unaware that anything is wrong, even as chronic fatigue, headaches, and irritability build up over months. Doctors therefore rely less on a patient's own account of the night and more on objective measurements, such as overnight oxygen levels and airflow patterns ③ recording in a sleep laboratory. ④ Left untreated, the disorder has been linked to serious long-term risks, including high blood pressure and heart disease, which makes an accurate diagnosis far more urgent than its subtle nighttime symptoms might ⑤ suggest.

When temperatures drop below freezing overnight, an ① invisible layer of black ice can form on sidewalks that look perfectly dry, catching even careful walkers off guard. Orthopedic doctors report a sharp ② rise in wrist and hip injuries every winter, most of them caused not by dramatic slips on icy hills but by a single unexpected step near a bus stop or a doorway. Walking with shorter, flatter steps and keeping the hands free rather than in pockets can help a person ③ regain balance quickly if a foot suddenly slides. Choosing shoes with textured rubber soles rather than smooth ones also makes a difference, since even a small ④ decrease in grip can prevent a fall before it begins. Treating every winter sidewalk as potentially icy, rather than trusting appearances, remains the ⑤ simplest way to avoid injury.

Economists traditionally measured a community's wealth in terms of factories, income, or infrastructure, yet sociologists increasingly point to a less ① visible resource: social capital, the networks of trust and reciprocity that allow people to cooperate for mutual benefit. Robert Putnam popularized the concept by documenting a ② decline in civic participation, noting that fewer Americans joined bowling leagues, parent associations, or local clubs even as bowling itself remained popular. Communities rich in social capital tend to enjoy ③ lower crime and more effective local government, because neighbors who know and trust one another can coordinate informally without relying entirely on formal institutions. However, social capital is not uniformly beneficial; tightly bonded networks can also ④ welcome outsiders and reinforce existing inequality. For this reason, researchers increasingly distinguish between bonding capital and bridging capital, which ⑤ connects otherwise separate communities.

Students who read many books across many different subjects often develop a habit that quieter learners sometimes lack: the habit of comparing new information with what they already know. A student who has read about ancient wars, ocean ecosystems, and modern economics can more easily notice when two different subjects share a similar pattern. This kind of connection-making is closely related to what psychologists call critical thinking, since _______________. Extensive reading also builds a large mental library of examples, which makes it easier to evaluate whether a new claim sounds reasonable or exaggerated.

Insomnia is rarely caused by a single factor; it usually emerges from an interaction between psychological stress and physiological arousal that keeps the body from settling into sleep. A common trigger is what researchers call cognitive hyperarousal, in which _______________. At the same time, the body's stress response system can become chronically activated, releasing hormones such as cortisol that keep heart rate and body temperature elevated at night, both of which interfere with the natural drop in arousal needed to fall asleep. Poor sleep habits, including irregular bedtimes and excessive screen use before bed, can further weaken the body's internal signals for sleep onset. Because these psychological and physiological factors reinforce one another, effective treatment for chronic insomnia addresses both the racing mind and the underlying pattern of physical tension, rather than relying on medication alone.

Every July, our school library launches a summer reading challenge that invites students to read at least five books before classes begin again in September. (A) Without daily homework and tests to worry about, summer gives students rare freedom to choose books purely because they sound interesting, not because a teacher assigned them. Librarians notice that students often pick more unusual genres during the challenge, including graphic novels, poetry, and nonfiction about hobbies they enjoy. (B) Students who complete the challenge receive a small prize, but many say the real reward is something else entirely. (C) This freedom seems to matter more than the prize itself, since students who only cared about winning tend to quit once the reading feels difficult, while curious readers keep going. Teachers who track student progress after summer report that challenge participants often return in September with noticeably stronger reading habits than classmates who read nothing over the break.

A plastic bag that fully decomposes within months rather than lingering for centuries sounds almost too convenient to be real, yet certain bioplastics on the market do exactly that under the right conditions. (A) Not every bioplastic biodegrades quickly, however, and some marketed as eco-friendly break down only in industrial composting facilities that reach conditions rarely found in a backyard compost heap or the open ocean. (B) Unlike conventional plastic, derived almost entirely from petroleum, many bioplastics are synthesized from renewable feedstocks such as corn starch or sugarcane, sometimes with the help of bacteria engineered to produce plastic-like polymers as a byproduct of their metabolism. (C) Critics point out that growing crops for bioplastic production can compete with food crops for farmland and water, which is why researchers are now exploring bioplastics made from agricultural waste and algae instead of dedicated crops.

After an especially demanding training session, the instinct to collapse onto a couch and remain motionless is understandable, yet exercise physiologists increasingly recommend the opposite approach. (A) This gentle activity keeps blood circulating through tired muscles, which appears to help clear metabolic byproducts more efficiently than complete stillness does. (B) Some athletes worry that any movement at all will interfere with the repair process, but research suggests that truly light activity does not meaningfully slow healing. (C) Active recovery involves performing low-intensity movement, such as a light jog, an easy swim, or a gentle bike ride, on days following intense exertion rather than resting completely.

Even small adjustments, such as dimming the lights an hour before bedtime, can make this environment noticeably more sleep-friendly. Sleep hygiene refers to a set of simple daily habits that help the body prepare for consistent, restorative rest. ( ① ) Experts commonly recommend going to bed and waking up at the same time every day, even on weekends, because an irregular schedule confuses the body's internal clock and makes it harder to fall asleep on demand. ( ② ) They also advise reserving the bedroom for sleep alone, since using the bed to study, scroll through a phone, or watch videos teaches the brain to associate that space with wakeful activity rather than rest. ( ③ ) Physical environment matters as well: a cool, dark, and quiet room tends to produce deeper sleep than one that is warm, bright, or noisy. ( ④ ) None of these individual habits guarantees a good night's sleep on its own, but together they form a routine that gradually trains the body to expect and enter sleep more easily, much the way a consistent set of cues trains an athlete's body to perform at a certain time each day. ( ⑤ )

주어진 문장: This is because the brain naturally pays more attention to things that are connected to a person's goals. Many students who reach their goals share one habit: they picture the goal clearly before they even start working. ( ① ) This process, called visualization, means imagining a goal in detail, often by drawing pictures or writing specific descriptions. ( ② ) For example, a student who dreams of studying abroad might make a board filled with photos of a foreign campus and a list of steps to get there. ( ③ ) Seeing these images every day keeps the goal fresh in mind and reminds the student why the effort matters. ( ④ ) Visualization also helps people notice small opportunities they might otherwise miss. ( ⑤ ) In addition, picturing success in advance can lower anxiety, because the mind grows familiar with the process instead of fearing an unknown outcome.