问题

Do you smoke?—No，I don’t.It’s two years since I __________.

A:smoked
B:have smoked
C:has smoked
D:don’t smoke

正确答案是：

同类题型

It was quite a long time I made it out what had happened

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up You look worriedWell,I_____on the problem for 5 hours but I haven’tgot a single clue

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