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【题目】People should avoid burning wheat stubble (秸秆), for it can______lots of smoke and causes serious air pollution.

A. protect B. prevent C. provide D. produce

【答案】D

【解析】

句意:人们应该避免焚烧秸秆,因为它会产生大量的烟雾,造成严重的空气污染。A.保护B.阻止C.提供D.产生,it指焚烧秸秆这件事,这种行为会“产生”烟雾,导致空气污染,故选D。

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