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【题目】Smoking is to people's health. Most smokers have suffered from lung diseases.

A.usefulB.helpfulC.beautifulD.harmful

【答案】D

【解析】

句意:吸烟对人们的健康有害。大多数吸烟者都患有肺病。

A. 有用的;B. 有帮助的;C. 漂亮的;D. 有害的;根据句意理解可知,这里表达的是有害的,英语是harmful,构成搭配be harmful to, 故选D

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