题目

Enough sleep is important to health. The amount of sleep   61  (need) depends on the age of the person and the conditions in   62   sleep takes place. The young may need more sleep than   63  old, but usually eight hours are enough for the health of grown-ups. Some can do with   64  than this amount, but others may need more. Every person knows his own need.   65   is then a matter of good judgment to satisfy his need. Sleep should always be enough to make one bring back his    66    (strong) and get ready for a day’s work. Fresh air is necessary to sound sleep. So it is not without reason for some people to think that it is practicable to sleep   67    the open air. A bath at bedtime,   68     hot nor cool but of body temperature, may be helpful     69     sleep. Sleep-producing drug should never be taken except when    70     (suggest) by a doctor. 答案：61.needed 62.which 63.the 64.less 65.It 66.strength 67.in 68.neither 69.to 70.suggested

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