영어 모의고사 (자동 편성)

Have you ever ①feel a boring class lasted forever while an exciting weekend disappeared in an instant? This common experience reflects what psychologists call the distortion of time perception: subjective time can ②differ from actual clock time. Researchers explain that people who focus intensely on an enjoyable activity ③process fewer separate moments, so time seems to pass quickly. In contrast, bored or anxious people pay closer attention to each moment, ④making time feel as though it is dragging. When people become deeply engaged in a task, they often lose track of time, ⑤unaware of how many minutes have passed.

Melatonin is a hormone produced by a small gland deep within the brain, and its release follows a remarkably ① unpredictable 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 ② 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 ③ delay its release and make falling asleep more difficult. Unlike some hormones that directly cause the body to perform a task, melatonin does not force sleep to occur; instead, it signals to the rest of the body that night has arrived, preparing various systems to shift into a ④ lower-energy state. Because of this signaling role, taking melatonin supplements at the wrong time can shift a person's internal clock in the ⑤ opposite direction from what was intended.

After an especially demanding training session, the instinct to collapse onto a couch and remain motionless is understandable, yet exercise physiologists increasingly recommend the ① opposite approach. 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. This gentle activity keeps blood circulating through tired muscles, which appears to help ② clear metabolic byproducts that accumulate during hard exercise more efficiently than complete stillness does. Some athletes worry that any movement at all will interfere with the repair process, but research suggests that truly light activity ③ accelerates healing considerably and may even reduce the perceived soreness that follows a hard session. The key distinction lies entirely in ④ intensity: active recovery is not a second workout in disguise but a deliberately gentle session designed to support, rather than compete with, the body's underlying repair ⑤ mechanisms.

Psychologists who study daily behavior describe habits through a model called the cue-routine-reward loop. This theory explains that every habit begins with a cue, a signal that tells the brain to start an automatic behavior. The brain then performs a routine, which is the action itself, whether physical or mental. Finally, the brain receives a reward, a positive feeling that makes it want to repeat the same behavior. For example, a notification sound can act as a cue that leads a student to check a phone, and the relief from boredom becomes the reward. Similarly, opening a refrigerator out of habit rather than hunger shows how a routine can run without conscious thought. Because this loop operates automatically, breaking a bad habit requires ___________. Understanding this structure helps people redesign daily patterns more effectively than relying on willpower alone.

Sleep is not a single, uniform state but a cycle that alternates between two very different modes: REM (rapid eye movement) sleep and non-REM sleep. (A) REM sleep, by contrast, brings rapid eye movements and brain activity resembling wakefulness, and is believed to help consolidate memories and process emotions. (B) A healthy night cycles through both stages several times, and disrupting either one can leave a person feeling unrested despite a full night in bed. (C) During non-REM sleep, particularly its deepest stage, the brain waves slow dramatically and the body focuses on physical repair.

주어진 문장: This constant tracking allows algorithms to build a detailed profile of each user's interests over time. Internet activist Eli Pariser introduced the term filter bubble to describe a phenomenon created by online algorithms. Social media platforms and search engines constantly track which links users click and how long they linger on certain posts. ( ① ) Based on this data, algorithms predict what each individual is most likely to enjoy and quietly prioritize similar content in future results. ( ② ) As a result, two people who type the same search query can receive strikingly different results, each tailored to personal history. ( ③ ) This automatic filtering happens silently, without users ever deciding to limit what they see. ( ④ ) Consequently, many people gradually lose access to viewpoints that challenge their existing beliefs, even though they never intended to avoid them. ( ⑤ ) Pariser warned that this invisible curation could weaken democratic debate by narrowing public discussion. Therefore, some experts argue that platforms should reveal how content is filtered, letting users knowingly escape their own bubbles.

주어진 문장: This gap between expectation and reality is not caused by laziness, but by a predictable pattern in how people think about the future. The planning fallacy describes the tendency to underestimate how long a task will take, even when experience suggests otherwise. ( ① ) Psychologists who studied this bias found that people focus mainly on an idealized, best-case version of a project. They focus less on how similar projects actually unfolded before. ( ② ) A student who insists an essay takes two hours, despite needing five hours for every previous essay, shows a clear instance of the fallacy. ( ③ ) Large construction projects offer another example. Officials frequently predict completion dates that later prove far too optimistic once delays appear. ( ④ ) One reason this bias persists is that people rarely review their history of missed deadlines, relying instead on hopeful imagination. ( ⑤ ) Some researchers recommend a technique called reference class forecasting, comparing a new task to similar completed tasks. By anchoring predictions to real outcomes, planners can produce estimates that are considerably more accurate.

These physiological adjustments, though subtle, translate into a noticeable difference once competition actually begins. Skipping a proper warm-up before intense exercise might seem like a harmless way to save a few minutes, but the practice carries real physiological costs. ( ① ) A cold muscle is stiffer and less elastic than a warm one, making it considerably more prone to strains and tears when suddenly asked to contract forcefully. ( ② ) Gradually raising body temperature through light activity increases blood flow to the muscles, allowing oxygen to reach tissue more efficiently and enabling nerve signals to travel faster between the brain and the muscle fibers. A proper warm-up also raises heart rate gradually, easing the cardiovascular system into strenuous work rather than shocking it with a sudden demand. ( ③ ) Athletes who warm up thoroughly tend to report better performance in the early minutes of competition, since their bodies are already primed rather than adjusting on the fly. ( ④ ) For this reason, coaches treat warm-up routines not as optional preparation but as an essential part of training itself. ( ⑤ )

Some athletes, in fact, experience excessive fatigue at altitude that undermines the very training they hoped to complete. Athletes preparing for major endurance events sometimes train for weeks at high altitude, where the air contains less oxygen than at sea level, in hopes of gaining a physiological edge once they return to compete at lower elevations. ( ① ) In this thin air, the body responds by producing more red blood cells, which carry oxygen more efficiently through the bloodstream to working muscles. ( ② ) When these athletes return to sea level, where oxygen is more abundant, their blood retains this elevated capacity for a limited period, potentially translating into improved endurance performance. ( ③ ) However, the benefits of altitude training are far from guaranteed, since individual athletes respond quite differently to the same conditions. ( ④ ) Many elite programs therefore follow a strategy known as live high, train low, in which athletes sleep at altitude to stimulate blood adaptations but perform intense workouts at lower elevation to maintain quality and intensity. ( ⑤ )

주어진 문장: Curious about why she always ran out of money so quickly, she asked her cousin for advice. When Mina was a freshman, she often spent her allowance within a few days. ( ① ) Her older cousin told her about the marshmallow experiment, a famous study in which children could eat one marshmallow immediately or wait for two. ( ② ) Researchers found that children who waited longer showed better academic performance and self-control years later. ( ③ ) This ability to resist an immediate reward in favor of a larger future one is known as delayed gratification. ( ④ ) Inspired by the study, Mina began saving half of her allowance each week instead of spending it all on snacks. At first, resisting small purchases felt surprisingly difficult, especially when her friends were eating out. After three months, however, she had saved enough to buy a bicycle she had wanted for over a year. ( ⑤ )