题目

阅读理解 A study shows exposure (暴露) to more light during the day and less light at night is important for people to get healthy sleep because it helps to keep the right body clock. The results suggest that in the office environment, being exposed to either sunlight or electric lights that are rich in short wave blue light may be important for the health of workers. To see whether the office workers get enough light to regulate (调节) their sleep wake cycle, researchers found the participants (参与者) in five government office buildings across the United States. A total of 109 people working at the offices wore light-measuring devices (仪器) for one week to do an experiment in summer, and 81 of these participants reduplicated the experiment in winter once again. The office workers wrote down their sleep and wake time. They also answered questions of their mood and sleep quality at the end of each study period. Researchers found that people who were exposed to lots of sunlight during the morning hours, between 8 am and noon, fell asleep more quickly at night compared to those exposed to low light in the morning. Office workers who were exposed to high levels of light all day, from 8 am to 5 pm, also fell asleep more quickly. Poor-quality sleep has been linked to health problems. Researchers say there are many easy things we can do during the day to increase our exposure to sunlight, such as looking out of the window and walking out for light during the day, especially during the morning and lunch time. （1） Where did the participants of the experiment work for? A . The government. B . The car factory. C . The local school. D . The airline company. （2） What does the underlined word "reduplicated" in paragraph 2 mean? A . Reused. B . Released. C . Repeated. D . Requested. （3） What can people do to make themselves fall asleep more easily? A . Eat much food. B . Drink lots of water at night. C . Talk with friends before sleeping. D . Expose themselves to sunlight during the day. （4） What can we infer from the last paragraph? A . Looking outside at night is helpful in falling asleep. B . Staying outside all day is bad for people's health. C . The quality of sleep influences people's health. D . The sunlight makes people hungry during the day. 答案： A C D C

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