Enough sleep is important to health. The amount of sleep【C1】______depends on the age of the person and the conditions in which s

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问题    Enough sleep is important to health. The amount of sleep【C1】______depends on the age of the person and the conditions in which sleep【C2】______The young may need more sleep than the old, but【C3】______eight hours are enough for the health of grown-ups. Some can do with less than this amount but【C4】______may need more. Every person knows his own need. It is then a matter of how to【C5】______it. Sleep should always be enough to make one relaxed and ready for【C6】______work.
   Fresh air is【C7】______to sound sleep. It is not【C8】______reason for some people to insist that it is practical to sleep in the open air.【C9】______a person can keep himself warm, out-of-door sleeping probably gives the body【C10】______complete relaxation.
   Ability to sleep is largely a habit. The conditions referred to only lead to sleep. Out-of-door【C11】______, a good habit of regular hours and the avoidance of late eating and【C12】______are helpful to sound sleep. Such factors are largely within the【C13】______of any person. A bath at【C14】______, neither hot nor cold but of body temperature, may be helpful to sleep. Sleeping pills should never be taken except when suggested by【C15】______.
【C9】

选项 A、As
B、Where
C、Unless
D、When

答案D

解析 语法结构题。本题主要考查状语从句。as:正如……,引导方式状语从句; where:在哪里,引导地点状语从句;unless:除非,如果不,引导条件状语从句时主句通 常有否定含义;when:什么时候,引导时间状语从句。通过分析句子关系和句意可知, 当一个人能使自己保暖,在户外睡觉也可以让身体彻底放松,因此应选D。
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本试题收录于: 英语题库普高专升本分类
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