Nowadays people use many methods to keep fit. For example, taking exercise and going on a diet. What is the purpose of keeping f

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问题    Nowadays people use many methods to keep fit. For example, taking exercise and going on a diet. What is the purpose of keeping fit? The【B1】of keeping fit is to avoid ill health,【B2】the mental and physical fatigue that makes us more likely to contract【B3】, and above all, to feel more【B4】in being alive. Research has shown the value of a【B5】diet, fresh air, sunshine,【B6】rest and some form of【B7】exercise for everyone. If everyone followed this plan, the number of people visiting the doctor and going to hospital would be【B8】reduced. Unfortunately,【B9】. We spend too much time watching others from the comfort of an armchair or a seat in the stand at a sports stadium. One reason why people who are physically fit live longer is that【B10】. The also avoid suffering the consequences of weakened muscles. About 640 muscles account for about 45% of our body’s weight,【B11】.Sensible exercise, suited to each individual and preferably undertaken on the advice of a doctor, is the best insurance of meeting these requirements.

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答案purpose

解析 在定冠词the和介词of之间应填名词。
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