题目内容
完形填空
Enough sleep is important to health. The amount of sleep 1 depends on the age of the person and the conditions in which sleep 2 . The young may need more sleep than the old, but 3 eight hours are enough for the 4 of grown-ups. Some can 5 with less than this amount (量) but 6 may need more. Every person knows his own 7 . It is then a matter of how to 8 it. Sleep should always be 9 to make one relaxed (松弛) and ready for 10 work.
Fresh air is 11 to sound sleep(酣睡) . It is not 12 reason for some people to 13 that it is practical to sleep in the open air. 14 a person can keep himself warm, 15 sleeping probably gives the body 16 complete relaxation.
Ability to sleep is largely a 17 . The conditions referred to only lead to sleep. Out -of-door 18 , a good habit of regular 19 and the avoidance (避免) of late eating and 20 are all helpful to sound sleep. Such factors (因素) are largely within the 21 of any person. A bath at 22 , neither hot nor cold but of 23 temperature, may be helpful to sleep. Sleeping pills (安眠药) should 24 be taken except when suggested by 25
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