영어 모의고사 (자동 편성)

A growing number of health apps now track steps, sleep, and heart rate throughout the day, ① quietly building a detailed picture of a user's physical condition without requiring a single visit to a doctor's office. By comparing this stream of data against patterns drawn from millions of other users, the app's algorithm can flag early warning signs, such as an irregular heartbeat, long before the person ② experiencing it would have noticed anything unusual on their own. For people living far from specialists or unable to afford frequent checkups, this kind of constant monitoring can ③ feel like a genuine safety net. Doctors caution, however, that these apps ④ are designed to detect patterns, not to diagnose illness, and that a worried user should always confirm any alarming reading with a professional. Treating a wellness app as a substitute for medical expertise, they warn, can ⑤ being just as risky as ignoring a warning altogether.

When an image-generating program produced a strikingly detailed painting in the exact style of a well-known illustrator within seconds, my art club spent an entire meeting ① ignoring what it actually meant for artists. Some members felt excited, imagining the software as a helpful tool that could speed up brainstorming or generate quick backgrounds for their comics. Others worried that the program had been trained on thousands of real illustrations scraped from the internet without the original artists' ② permission, meaning the tool's impressive results were quietly built on other people's ③ uncredited labor. A few pointed out that the final image, however skillful it looked, reflected no personal memory, struggle, or ④ intention, only patterns learned from existing pictures. The debate never reached a clear conclusion, but it made me realize that questions about creativity now involve not just how a picture looks, but where it actually came from and who deserves ⑤ credit for it.

A cluster of neurons smaller than a pea can now spontaneously organize itself into layered structures that ① mimic, in miniature, the architecture of a developing human brain. Grown from stem cells coaxed to follow the same developmental cues that guide an embryo, these brain organoids have begun firing electrical signals in patterns that ② sharply resemble the activity recorded in an infant's brain. For researchers studying disorders such as autism or schizophrenia, this offers something long unavailable: a living model of human brain development that can be observed and manipulated directly, without ever touching an actual patient. Because organoids lack sensory organs, a body, or any connection to the outside world, most neuroscientists argue that the structures ③ cannot generate anything resembling subjective experience, however brain-like their electrical activity may appear. Even so, the pace at which these organoids are growing more ④ complex has convinced some ethicists that the field would benefit from establishing clear ⑤ boundaries now, before the science outruns the conversation about what it means.

A short nap taken in the early afternoon, often called a power nap, can noticeably sharpen attention and mood without leaving a person ① refreshed afterward. The key lies in timing: naps limited to roughly twenty minutes allow the brain to pass through the ② lightest stages of sleep while avoiding the deeper stages associated with slow-wave activity. If a nap extends much beyond that window, the sleeper risks waking during deep sleep, which produces a ③ foggy, disoriented feeling known as sleep inertia that can persist for thirty minutes or more. Laboratory studies comparing napping and non-napping groups have ④ repeatedly shown that a brief nap improves reaction time and short-term memory almost as effectively as a full night of extra rest. Interestingly, the benefit appears ⑤ strongest when the nap occurs several hours after waking, since this is when the body's natural dip in alertness makes rest most effective.

Elite athletes often perform in front of enormous crowds with championships, contracts, and years of training riding on a single moment, and the psychological weight of that pressure can undermine skills that feel automatic in practice. Sports psychologists explain that intense anxiety narrows attention and disrupts the smooth, unconscious execution of well-learned movements, a phenomenon sometimes called choking under pressure. Rather than trying to eliminate nervousness entirely, which research suggests is nearly impossible, many trainers now teach athletes to _______________. Structured breathing exercises and pre-performance routines also help athletes regain a sense of control before a decisive moment.

Our photography club meets every Thursday, and our advisor always repeats the same instruction before we leave campus: _______________. At first this rule frustrated me, since I had joined the club specifically to take pictures, not to stand around empty-handed. Over time, though, I noticed that the members who followed her advice most closely tended to bring back the most interesting photographs. A camera, our advisor explained, cannot teach a person what is worth noticing; it can only record what the photographer has already decided matters. Learning to look carefully, it turns out, is a skill that develops long before a finger ever touches the shutter button.

Many students imagine a librarian simply sitting behind a desk and stamping books. Ms. Han, who has worked at a school library for over ten years, says that image is far from accurate. A large part of her job involves choosing which new books to buy, based on both student requests and current trends in youth literature. She also spends hours training students to search databases and judge whether an online source is trustworthy, a skill she considers just as important as reading itself. According to Ms. Han, the most rewarding moment is not organizing shelves but _______________. She admits that budgets are often tight and that new technology keeps changing how libraries operate.

Across the world, teenagers are chronically short on sleep, often getting two or three hours less than the eight to ten hours experts recommend for their age. (A) In response, some school districts have experimented with delaying start times, and early results suggest that students who gain extra rest show improved grades and better mood. (B) As a result, chronic sleep loss during adolescence has been linked to impaired concentration, weakened memory, and a higher risk of anxiety and depression. (C) Part of the problem lies in biology, since the body's internal clock naturally shifts later during puberty, while school start times rarely adjust to match.

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.

In response, some platforms have begun inserting occasional wildcard suggestions that are deliberately unrelated to past viewing habits. After a viewer finishes an episode, a streaming service rarely leaves the choice of what to watch next entirely up to chance. ( ① ) Instead, a recommendation algorithm compares that viewer's habits with patterns drawn from millions of other users who watched similar content, then ranks thousands of titles in order of predicted interest. ( ② ) This approach keeps viewers engaged far longer than a simple list of new releases ever could, which is precisely why streaming companies invest so heavily in refining it. ( ③ ) The system is not without drawbacks, however. Because the algorithm favors titles similar to what a viewer already enjoys, it can quietly narrow someone's exposure to unfamiliar genres, directors, or cultures, creating a comfortable but repetitive bubble. ( ④ ) These wildcard picks are meant to counteract this narrowing effect and keep recommendations from becoming too predictable. ( ⑤ )