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  3. Two-thirds of Americans are overweight or obese. Developing countries are catching up. In China nearly 30% of adults are too wid

Two-thirds of Americans are overweight or obese. Developing countries are catching up. In China nearly 30% of adults are too wid

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问题     Two-thirds of Americans are overweight or obese. Developing countries are catching up. In China nearly 30% of adults are too wide. In 2013 policymakers around the world will【S1】______that something must be done. But what,【S2】______?
    The problem seems simple: people【S3】______ more calories than they spend. Technically, reversing this is a matter of【S4】______choice. Do 1 eat the doughnut or go for a run? But this masks the tangle of factors that influence weight.
    People have【S5】______to favor salt, fat and sweets, gobbling as much as possible to store energy should they【S6】______famine. But human biology is ill-suited for the modern world. Junk food is cheap and delicious; firms spend billions advertising it. In America sugary drinks【S7】______for at least 20% of the weight gained from 1977 to 2001. In 2011 the average Mexican guzzled(狂欢)728 eight-ounce servings of Coca-Cola, more than in any other country. About 30% of Mexican adults are obese. Meanwhile jobs require less physical【S8】______Cars have reduced the need for walking and cycling. Add to these big【S9】______a host of smaller factors are the playgrounds nearby, do schools serve【S10】______lunches, do parents have time to prepare meals? and the balance between calories and exercise seems hopelessly tilted towards the former.
A)individual F)evolved K)consume
B)proper G)conduct L)required
C)realize H)exertion M)exactly
D)rich I)accounted N)apply
E)encounter J)trends O)importantly
【S8】
选项
答案H
解析 名词辨析题。空格所在的句子中缺少宾语，根据空格前的形容词来判断空格处应填名词。根据下文中提到的“汽车减少了步行和骑自行车的需要”可知，本句的意思应该为“现在的工作不怎么需要体力消耗”，所以exertion比较符合题意。
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大学英语四级

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