영어 모의고사 (자동 편성)

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.

When a customer opens a company's website at midnight with a billing question, an actual employee is ① common to be available, which is exactly the gap that customer service chatbots were built to fill. These programs can instantly answer common questions, track packages, and process simple refunds without making anyone wait on hold. Companies ② value them because a single chatbot can handle thousands of conversations simultaneously, something no call center could ever match. Yet the technology has clear ③ boundaries. When a customer's problem is unusual, emotionally charged, or simply does not fit the chatbot's script, the automated replies can feel frustratingly ④ circular, repeating the same suggestion no matter how the question is rephrased. Many companies have responded by designing chatbots to recognize their own limits, automatically transferring a frustrated customer to a human agent before the conversation turns into a source of ⑤ complaint rather than a solution.

A growing number of health apps now track steps, sleep, and heart rate throughout the day, quietly building a detailed picture of a user's physical condition. 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 experiencing it would have noticed anything unusual. Doctors caution, however, that these apps are designed to detect patterns, not to diagnose illness, and that _______________.

Anthropologist Robin Dunbar proposed a concept now known as Dunbar's number, suggesting that human beings can only maintain about one hundred fifty stable social relationships at any given time. This limit, he argued, comes from the size of the human brain, which restricts how many meaningful connections a person can cognitively manage. In contrast, many social media users today have hundreds or even thousands of online friends and followers, a number far exceeding what Dunbar's research predicts. However, having numerous digital contacts does not necessarily mean that all of these relationships are close or emotionally supportive. Most users, when asked, admit that they interact regularly with only a small fraction of their total followers, while the rest remain largely unnoticed. Therefore, Dunbar's number reminds us that ___________.

Retailers use a variety of techniques designed to encourage customers to make unplanned purchases. Placing small, inexpensive items near checkout counters, for example, tempts shoppers who are already waiting in line with little else to do. Online stores achieve a similar effect through countdown timers that create a false sense of urgency, suggesting that a deal will vanish within minutes. Bright colors, cheerful music, and pleasant scents are also carefully chosen to put customers in a relaxed mood, making them less likely to think critically about their spending. Critics argue that these tactics ___________. Supporters of the industry insist that such techniques merely make shopping more enjoyable and are not inherently deceptive.

As artificial intelligence grows more capable of performing tasks once considered exclusively human, many people wonder which skills will remain valuable in the future. However, most researchers argue that AI still struggles with tasks requiring genuine empathy, ethical judgment, and creative problem-solving in unfamiliar situations. Similarly, AI can generate countless design variations, yet it lacks the lived experience that allows humans to judge which idea truly resonates with people. For this reason, educators increasingly emphasize skills such as collaboration, critical thinking, and emotional intelligence, arguing that ___________.

Smart speakers have quietly become a fixture in many households, responding to spoken requests for weather updates, music, or kitchen timers. (A) Still, the technology remains far from perfect, since background noise, overlapping voices, or an unusual sentence structure can cause the assistant to misunderstand a simple request. (B) Because these assistants improve by learning from millions of interactions, they gradually become better at recognizing regional accents and casual phrasing that once confused them. (C) Behind this simple exchange lies a complex process: the device converts sound waves into text, interprets the meaning, and then generates a spoken reply, all within a second or two.

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. (A) 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 recorded in a sleep laboratory. (B) 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 waking up fully. (C) Because these interruptions rarely produce a clear memory the next morning, many people remain unaware that anything is wrong, even as chronic fatigue, headaches, and irritability build up over months.

주어진 문장: This small change in placement, researchers found, was enough to shift eating habits without anyone noticing. Imagine a cafeteria where a healthy salad sits at eye level while fried snacks rest on a low shelf. ( ① ) Nobody is forbidden from choosing the snacks, yet most people quietly pick the salad instead. ( ② ) This simple technique illustrates a nudge, a concept from behavioral economics that gently guides people toward better choices without restricting their freedom. ( ③ ) Companies and governments increasingly apply nudges to encourage sustainable consumption. ( ④ ) For example, some hotels print reminders on towels stating that most guests reuse them, which persuades new guests to do the same and save water. Similarly, energy bills that compare a household's usage with that of efficient neighbors often lead people to reduce electricity use. ( ⑤ ) Unlike strict regulations or heavy taxes, nudges rely on subtle changes in design rather than force. Critics argue nudges alone cannot solve large environmental problems, but combined with stronger policies, they can meaningfully shift everyday habits toward sustainability.

주어진 문장: Even a short break from checking their phones can trigger a nagging sense of unease. Many teenagers check their social media accounts dozens of times a day, worried that they might miss something important happening among their friends. ( ① ) This anxiety, known as FOMO, or the fear of missing out, arises when people believe that others are enjoying experiences from which they themselves are excluded. ( ② ) For example, a student scrolling through photos of a party she was not invited to may suddenly feel a wave of loneliness and regret, even though the event has already ended. ( ③ ) Constantly refreshing feeds to avoid missing such updates, however, makes it difficult to concentrate on schoolwork or conversations happening in the present moment. ( ④ ) Moreover, this endless comparison with curated highlights of other people's lives tends to deepen feelings of anxiety rather than relieve them. ( ⑤ ) Therefore, students should learn to limit their social media use and focus more attention on the relationships and activities directly in front of them.