Walking, if you do it vigorously enough, is the overall best exercise for re

游客2023-07-08 19

问题 Walking, if you do it vigorously enough, is the overall best exercise for regular physical activity. It requires no equipment, everyone knows how to do it and it carries the【C1】______risk of injury. The human body is designed to walk. You can walk in parks or along a river or in your neighborhood. To get【C2】______benefit from walking, aim for 45 minutes a day, an average of five days a week.
Strength training is another important【C3】______of physical activity. Its purpose is to build and【C4】______bone and muscle mass, both of which shrink with age. In general, you will want to do strength training two or three days a week,【C5】______recovery days between sessions.
Finally, flexibility and balance training are【C6】______important as the body ages. Aches and pains are high on the list of complaints in old age. The result of constant muscle tension and stiffness of joints, many of them are【C7】______, and simple flexibility training can【C8】______these by making muscles stronger and keeping joints lubricated(润滑). Some of this you do whenever you stretch. If you watch dogs and cats, you’ll get an idea of how natural it is. The general【C9】______is simple: whenever the body has been in one position for a while, it is good to【C10】______stretch it in an opposite position.
A)allowing F)helping K)prevent
B)avoidable G)increasingly L)principle
C)briefly H)lowest M)provoke
D)component I)maintain N)seriously
E)determined J)maximum O)topic [br] 【C2】

选项

答案 D

解析空格处位于形容词important和介词of之间，需填入名词。文章第一段提到步行是锻炼身体的最佳形式，空格处句子为第二段的主题句，提到力量训练是锻炼身体的另一个重要部分，因此空格处名词应该表示“组成部分”。故component符合题意，意为“组成部分，成分”。

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