Question

【题目】—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

Answer 1

【答案】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。