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Doctors are doing research to find out w...

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

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

 

A 【解析】 试题分析:考查动词辨析。动词quit放弃,戒除;decline下降;prevent阻止,预防;reserve预定,保留;句意:医生们正在研究当人们戒烟的时候身体上会发生什么变化。根据句意可知A正确。 考点:考查动词辨析  
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