2. 外语
  3. Throughout evolution, humans have been active. Our ancestors chased prey as hunter-gatherers and【C1】______from predators. More r

Throughout evolution, humans have been active. Our ancestors chased prey as hunter-gatherers and【C1】______from predators. More r

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问题     Throughout evolution, humans have been active. Our ancestors chased prey as hunter-gatherers and【C1】______from predators. More recently, they labored on farms and in factories. But the decline of【C2】______and industrial labor, plus the【C3】______of the car, a multitude of labor-saving devices and—most perniciously—TV, computers and video games, mean we’ ve all ground to a sudden and catastrophic standstill.
    As we have become inactive, so once-rare diseases have【C4】______. A report from the organisation Diabetes UK reveals that in 1935, when the world’ s population was just over 2 billion, an estimated 15 million people【C5】______had type 2 diabetes. By 2010 the world’ s population had more than trebled and the number with diabetes had shot up to 220 million, with 300 million【C6】______for 2025. Likewise, results published earlier this year in the Journal of the American Medical Association showed that over a third of US men and women are obese, as are about 17 percent of US children.
    Physical inactivity is【C7】______us. " Everyone knows too much booze or tobacco is bad for you, but if physical inactivity was packaged and sold as a product, it would need to carry a health warning【C8】______," says Hughes.
    The good news is that we can do something about it. A plenty of recent studies show that exercise protects us from heart attacks, strokes, diabetes, obesity, cancer, Alzheimer’ s disease and depression. It even【C9】______memory. And it has the potential to prevent more premature deaths than any other single【C10】______, with none of the side effects of actual medication. So, exercise may be a wonder drug.
    A)agricultural I)killing
    B)boosts J)label
    C)disappeared K)mushroomed
    D)exposing L)predicted
    E)fled M)reflection
    F)globally N)standard
    G)handle O)treatment
    H)invention
【C9】
选项
答案B
解析 本段主要为一般现在时，本句的主语是it，由此可判断本空格应该填一个动词的第三人称单数形式。前文介绍了运动给我们带来的好处——能预防各种疾病，可见本空格所填动词应该具有积极意义。故答案为B)boosts(增强，提高)。
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