题目内容
Fresh air is 【C11】______ to sound sleep. It is not 【C12】______ reason for some people to 【C13】______ that it is practical to sleep in the open air. 【C14】______ a person can keep himself warm, 【C15】______ sleeping probably gives the body 【C16】______ complete relaxation.
Ability to sleep is largely a 【C17】______ . Out-of-door 【C18】______ , a good habit of regular 【C19】______ , the avoidance(避免)of late eating, and 【C20】______ are all helpful to sound sleep.
【C1】______
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If one wants to work more efficiently at his low point in the morning, he should______.
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If you smoke-particularly cigarettes-you are far more likely than a non-smoker to suffer or die from several major diseases-notably lung cancer.
One smoker in four dies prematurely (过早的) because of his smoking. The risk of dy-ing for a heavy smoker (between the ages of 35 and 55) is roughly equal to the risk run by a non-smoker 10 years older.
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Women who smoke during pregnancy produce babies on average about 5 to 8 ounces lighter than those who don't.
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