영어 모의고사 (자동 편성)

Automation is transforming labor markets more quickly than economists predicted only a decade ago. Factories once staffed by hundreds of workers now rely on robotic arms ①that assemble products with remarkable precision. Warehouses use automated systems ②to sort and deliver packages within a few hours. This shift does not simply eliminate jobs; it also creates roles that ③never exists before. Technicians who maintain robotic equipment are now in high demand, and engineers who design efficient systems ④are highly valued. Policymakers argue that retraining programs ⑤are essential to help displaced workers move into emerging fields.

Sleep debt refers to the ① cumulative gap between the amount of sleep a person needs and the amount they actually get. Unlike a financial debt, however, this deficit cannot simply be ② repaid with a single long weekend of rest. When someone loses two hours of sleep every night for a week, the body does not treat the shortage as fourteen separate small losses; instead, it ③ accumulates the deficit, and the resulting impairment in attention and mood can resemble that of a person who has been awake for an entire night. Researchers have found that even modest, chronic sleep restriction gradually impairs reaction time and decision-making, often without the affected person noticing the decline. This is because subjective feelings of tiredness tend to plateau after a few days, even as objective performance keeps deteriorating. Consequently, people frequently ④ underestimate how much sleep debt they are carrying until a demanding task suddenly exposes the ⑤ diminished cost.

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.

As governments and companies work to address climate change, a new category of employment known as green jobs has ①expanded rapidly. Unlike many traditional industrial jobs, green jobs often require workers to combine technical training with an understanding of environmental science. Countries that have invested heavily in renewable energy have seen employment in this sector grow far ②faster than in the economy overall. Young workers, in particular, are drawn to green careers because they offer a sense of purpose alongside financial ③stability. Critics point out that transitioning workers from fossil fuel industries to green jobs can be surprisingly ④easy, since the required skills can differ significantly. Governments are therefore introducing training programs designed to help such workers shift ⑤smoothly into renewable energy careers.

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. 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, since _______________. 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 and may even reduce the perceived soreness that follows a hard session.

Wearable devices that track sleep have become enormously popular, promising a detailed breakdown of light, deep, and REM sleep each night. These gadgets typically rely on movement sensors and heart rate monitors to estimate sleep stages, since directly measuring brain activity would require equipment found only in a sleep laboratory. This indirect approach, however, introduces significant uncertainty. Independent studies comparing wearable data with polysomnography, the gold-standard method used in clinical sleep labs, have found that _______________. Some trackers overestimate deep sleep, while others underestimate the amount of time spent in REM sleep, and the margin of error can vary widely between brands. Despite these limitations, many users have come to treat the nightly score generated by their device as an objective medical verdict, sometimes experiencing anxiety when the number falls below what they expect, a phenomenon researchers have begun calling orthosomnia.

Three-dimensional printing technology is changing how products are designed and manufactured across many industries. Unlike traditional manufacturing, which often requires expensive molds and long production times, ___________. This flexibility allows companies to produce small batches of customized products without the massive costs typically associated with mass production.

After a strenuous workout, muscle fibers experience thousands of microscopic tears, and the body immediately begins a repair process that depends heavily on amino acids, the building blocks that protein supplies. (A) Waiting too long to eat, however, can slow this recovery, since a muscle's sensitivity to amino acids gradually declines once that window closes. (B) Even so, eating an enormous quantity of protein in a single sitting will not speed things up any further, because the body can only use a limited amount at once, burning or storing the rest. (C) This is precisely why sports scientists recommend consuming protein within a couple of hours after a workout, while the muscle is still especially receptive to it.

Advertisers rely on a range of psychological strategies to shape how consumers perceive their products. (A) One especially common strategy involves showing large crowds of satisfied customers, implying that popularity equals quality. (B) These strategies work most effectively when viewers remain unaware that they are being persuaded at all. (C) For this reason, teaching people to recognize such techniques can reduce their persuasive power significantly.

That two- or three-hour gap may look modest on paper, but its effects accumulate quickly, touching everything from mood to memory. 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. ( ① ) Part of the problem lies in biology: as puberty begins, the body's internal clock naturally shifts later, making it difficult for teenagers to fall asleep before eleven at night. ( ② ) Yet school start times rarely adjust to this shift, forcing students to wake before their bodies are ready. ( ③ ) The consequences extend well beyond simple tiredness. Chronic sleep loss during adolescence has been linked to impaired concentration, weakened memory, and a higher risk of anxiety and depression. ( ④ ) It can also disrupt the hormones that regulate appetite, contributing to unhealthy weight gain over time. Some school districts have experimented with delaying start times by even thirty minutes, and early results suggest that students who gain that extra rest show improved grades, better mood, and fewer tardy arrivals. ( ⑤ ) Despite this evidence, changing entrenched school schedules remains a slow and contentious process.