问题
选择题
—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
答案
A
since从句中动词若为延续性动词,则意为“自从不……以来”。
—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
A
since从句中动词若为延续性动词,则意为“自从不……以来”。