【題目】Doctors are doing research to find out what happens physically when people______ smoking.

A.quit B.decline C.prevent D.reserve

【答案】A

【解析】

試題分析：考查動詞辨析。動詞quit放棄，戒除；decline下降；prevent阻止，預(yù)防；reserve預(yù)定，保留；句意：醫(yī)生們正在研究當(dāng)人們戒煙的時(shí)候身體上會發(fā)生什么變化。根據(jù)句意可知A正確。

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