题目内容
—Hi, Tom, would you like to smoke?
—No, thank you. It has been six months since I _________ smoking.
A. stop B. stopped C. am stopping D. will stop
B 【解析】句意:——嗨,汤姆,你想抽烟吗?——不,谢谢。我戒烟已经六个月了。考查动词时态辨析题。since自从,用于现在完成时,引导的时间状语从句需用一般过去时,根据句意语境,可知选B。
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