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  3. Enough sleep is important to health. The

Enough sleep is important to health. The

考试题库2022-08-02  57
问题 Enough sleep is important to health. The amount of sleep 　21　 depends on the age of the person and the conditions in which sleep 　22　. The young may need more sleep than the old, but 　23　 eight hours is enough for the health of grown-ups. Some can do with less than this amount but 　24　 may need more. Every person knows his own need. It is then a matter of how to 　25　 it. Sleep should be always enough to make one relaxed (松弛) and ready for 　26　 work.　　Fresh air is 　27　 to sound sleep(酣睡).It is not 　28　 reason for some people to insist that it is practical to sleep in the open air. 　29　 a person can keep himself warm, out of-door sleeping probably gives the body 　30　 complete relaxtion.　　Ability to sleep is largely a habit. The conditions referred to only lead to sleep. Out-of-door 　31　, a good habit of regular drinking and the avoidance of late eating and 　32　 are all helpful to sound sleep. Such factors are largely within the 　33　 of any person. A bath at 　34　, neither hot nor cold but of body temperature, may be helpful to sleep. Sleeping pills should never be taken except when suggested by 　35　.____．A. AsB． WhereC． UnlessD． When
选项 A. As
B． Where
C． Unless
D． When
答案 D
解析 此题应是when引导的时间状语。句意为：“如果能保持暖和，在户外睡觉可使身体彻底放松。”
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