영어 모의고사 (자동 편성)

Sleep debt refers to the 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 ①be 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 accumulates the deficit, and the resulting impairment in attention and mood can resemble that of a person ②who 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 ③noticing the decline. This is because subjective feelings of tiredness tend to plateau after a few days, even as objective performance keeps ④deteriorate. Consequently, people frequently underestimate how much sleep debt they are carrying until a demanding task suddenly ⑤exposes the accumulated cost.

A smart thermostat that learns a family's daily rhythm can lower the temperature automatically before everyone wakes up cold, while smart lights ①that follow a resident's schedule no longer need to be switched on and off by hand. These small conveniences rest on a shared foundation: sensors collect data about temperature, motion, and light throughout the home, and an algorithm gradually learns ②which settings match each household's actual habits rather than a factory default. Over months of use, the system becomes noticeably better at ③anticipate needs, often adjusting settings moments before a resident would have reached for a switch. Yet convenience comes with a trade-off that many households ④overlook. Every one of these small adjustments depends on constant data collection, meaning that a detailed record of when people wake, leave, and return home is quietly ⑤being stored somewhere beyond their immediate control.

Adaptive learning apps promise something no traditional classroom can easily offer: a lesson plan ①that adjusts itself to each individual student in real time. As a student answers practice questions, the app tracks which concepts are mastered and which remain shaky, then quietly ②reshuffles the next set of problems to target the weaker areas. Early studies suggest that this personalized pacing can help struggling students ③catch up faster than a one-size-fits-all worksheet ever could. However, critics caution that an app cannot replace the encouragement, humor, and flexibility a human teacher brings to a lesson, especially when a student ④frustrating rather than simply behind. There is also a subtler concern: students who grow used to instant, algorithm-generated feedback may struggle later with the slower, more ambiguous kind of feedback that real-world tasks and mentors typically ⑤provide.

The framing effect describes how people respond differently to the same information depending on how it is presented, even when the underlying facts remain unchanged. When news outlets describe climate change primarily as a looming ①crisis, filled with images of disasters and warnings of irreversible damage, audiences often react with ②confidence or, paradoxically, with hopeless resignation. In contrast, when the same issue is framed as an ③opportunity, emphasizing innovative technologies and emerging green jobs, readers tend to feel more ④motivated to act and support policy change. Neither framing alone tells the complete story, since climate change genuinely involves both serious risks and promising solutions. Therefore, journalists who rely too heavily on either extreme risk distorting public understanding and discouraging meaningful engagement. A ⑤balanced approach, which honestly presents dangers while highlighting realistic paths forward, is far more likely to sustain long-term public attention and inspire lasting action.

Turning on automatic captions used to mean settling for garbled text full of obvious errors, but recent speech-recognition models have made same-language captions ①accurate enough that many viewers now leave them on by default, even when watching content in their native language. The technology listens to audio, breaks it into individual sounds, and matches those sounds against a massive library of words and phrases to predict what was actually said. For viewers who are deaf or hard of hearing, this improvement has quietly ②transformed everyday access to video content that once required a human transcriber and a considerable amount of time to caption properly. The system still ③excels at overlapping speakers, strong accents, and specialized vocabulary such as medical or technical terms, occasionally producing captions that are unintentionally funny. Even with these ④flaws, most users agree that imperfect captions are far more ⑤useful than no captions at all.

Every cell in the human body follows an internal timer known as the circadian rhythm, a roughly twenty-four-hour cycle that ①governs when we feel alert and when we feel drowsy. This clock is regulated primarily by a tiny cluster of neurons in the brain that responds to light entering through the eyes. When morning sunlight strikes the retina, the cluster signals the body to ②suppress sleep hormones and raise body temperature, preparing us for activity. As evening approaches and light fades, the same mechanism triggers the release of melatonin, a hormone that ③promotes drowsiness. Because this rhythm evolved around the natural cycle of day and night, modern habits such as staying indoors under artificial light or working night shifts can push the internal clock ④out of sync with the external environment. Such misalignment does not simply cause tiredness; it has also been associated with digestive problems and ⑤heightened concentration, suggesting that timing matters as much as total sleep hours.

Team sports place athletes in a uniquely social form of competition, one where individual skill alone ①rarely determines the outcome of a match. Sports psychologists have long studied why some groups of talented individual players fail to perform as a cohesive unit while other, less individually skilled teams consistently ②exceed expectations. Trust among teammates appears to be a ③decisive factor, since players who believe their teammates will reliably fulfill their roles are more willing to take the calculated risks that winning often requires. Clear and consistent communication during high-pressure moments further reduces the hesitation and confusion that can ④unravel a team's coordination in front of a crowd. Interestingly, researchers have found that teams which deliberately build informal social bonds off the field tend to display better on-field cohesion, suggesting that chemistry can ⑤easily be manufactured through drills alone.

In recent years, mental health experts have identified a distinct emotional response to environmental crisis, commonly called eco-anxiety. Eco-anxiety describes persistent worry, grief, or fear triggered by awareness of climate change and its consequences for the future. Although people of all ages can experience it, teenagers and young adults seem especially ①immune, since they anticipate living through decades of worsening conditions. Common symptoms include difficulty sleeping, a sense of ②hopelessness, and guilt over ordinary choices such as travel or diet. For example, some students report feeling ③paralyzed whenever they read alarming climate news, unable to focus on schoolwork or hobbies. However, experts emphasize that eco-anxiety is not a disorder to be eliminated but a ④natural reaction that can be channeled productively. Rather than avoiding the topic, young people are encouraged to join community projects, since taking constructive action tends to ⑤restore a sense of control and ease overwhelming distress.

Planning a multi-city trip once meant hours spent comparing flight schedules, reading hotel reviews, and mapping out which sights were close enough to visit in a single day. AI travel planners now compress much of that work into a short conversation, generating a full day-by-day itinerary within minutes. Many travelers appreciate having a solid starting point rather than a blank page. Still, seasoned travelers warn that _______________.

None of these explanations, in other words, has to be the whole story. For centuries, dreams have fascinated scientists and philosophers alike, yet no single theory fully explains why the sleeping brain generates such vivid and often bizarre experiences. ( ① ) One prominent idea suggests that dreaming helps the brain process emotional experiences, replaying difficult events in a safe, low-stakes environment so that their emotional intensity gradually fades. ( ② ) Another theory proposes that dreams serve a more practical function, allowing the brain to rehearse responses to threats without any real danger, a kind of nightly simulation that may have offered early humans a survival advantage. ( ③ ) Still other researchers argue that dreaming is simply a byproduct of the brain organizing memories, with vivid imagery arising as the mind sorts through the day's information rather than serving any independent purpose of its own. ( ④ ) Because these theories rest on indirect evidence rather than direct observation of subjective experience, none has been conclusively proven. ( ⑤ ) Many scientists now suspect that dreaming may serve several of these functions simultaneously rather than just one.