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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
【S7】
选项
答案I
解析 固定搭配题。空格前为sugary drinks，后面为宾语at least 20％ of the weight，所以空格处应填入一个谓语动词，并且能和for组成固定搭配。此处的意思为“在美国，含糖饮料要为国民体重增长负责任”，因此accounted符合句意，accounted for表示“占(一定数量或比例)”。
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