题目内容
--Take a cigarette, please.
--No, thanks. It's three years ________ I smoked.
[ ]
A. before
B. since
C. after
D. when
答案:B
提示:
提示:
|
smoke是延续性动词,在since从句中应从其结束时间算起,smoke的结束为stop smoking.句意为:我有三年没有抽烟了. |
练习册系列答案
相关题目