Forget milky drinks, hot water bottles or curling up with a good book. The real secret to a good night’s sleep may be where you

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问题     Forget milky drinks, hot water bottles or curling up with a good book. The real secret to a good night’s sleep may be where you sit at work.
    Not only can the stress of work leave employees【C1】________and turning, but sitting too far from a window can knock 46 minutes【C2】________a normal night’s sleep. Researchers found that workers forced to【C3】________in windowless rooms had a poorer quality of life and more irregular sleep patterns than those【C4】________daylight.
    The findings, published in the Journal of Clinical Sleep Medicine,【C5】________the working environment may be【C6】________to setting the body’s own internal clock. Researchers say【C7】________designed offices could boost the physical and mental health of workers. "We suggest that architectural design of office environments should place more【C8】________on sufficient daylight exposure for workers in order to【C9】________health and well-being," said Dr Ivy Cheung of the Department of Neurology, Northwestern University, Chicago. "Office workers with more light exposure at the work place also【C10】________have better sleep quality, more physical activity and a better quality of life."
    A sunny day is equivalent to about 10,000 lux or higher of light. However indoor office lighting【C11】________ provides only about 300 to 500 lux.
    One【C12】________three British people suffers from poor sleep, with stress, computers and taking work home often【C13】________for the shortage of quality sleep.
    【C14】________the cost of all those sleepless nights is more than just bad moods and a【C15】________of focus. Regular poor sleep【C16】________the risk of serious medical conditions like obesity, heart and diabetes—and can even shorten life expectancy.
    【C17】________exposure to natural daylight is known to be important for governing the body’s the built-in clock which【C18】________our sleeping and waking patterns. Independent sleep expert Dr Neil Stanley said the body needs exposure to daylight to keeps its sleeping patterns【C19】________." Light is essentially the thing that tells our bodies to be【C20】________and dark tells them to go to sleep.
【C20】

选项 A、active
B、alert
C、awake
D、healthy

答案C

解析 空格后的and将其前后两个部分进行对比。“光线”对“黑暗”,“告诉我们的身体……”对“告诉我们的身体睡觉”。由此可知,光线就是让人保持清醒的状态,故选C项awake“醒着的”。A项active“积极的”,应该跟“消极的”相对。B项alert“警觉的”,常指密切注意身体的事物,用在句中逻辑不对。D项healthy“健康的”,与go to sleep“睡觉”不是对比关系。
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