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题目
题型:不详难度:来源:
—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
解析
since从句中动词若为延续性动词,则意为“自从不……以来”。
核心考点
试题【—Do you smoke?—No,I don’t.It’s two years since I __________.A.smokedB.have smo】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
You can certainly leave the classroom as soon as your homework__________.
A.has done
B.has been done
C.will be done
D.will have been done

题型:不详难度:| 查看答案
—Did you telephone the manager’s office?
—Yes,he__________back before 9 o’clock this morning.
A.expectsB.is expectedC.expectedD.was expected

题型:不详难度:| 查看答案
—Would you like to tell me what our teacher said just now?
—She said that light__________faster than sound.
A.travels
B.traveled
C.would travel
D.was traveling

题型:不详难度:| 查看答案
—Has William finished writing his graduation paper yet?
—I don’t know exactly,but he __________all day.
A.is writingB.has been writing
C.was writingD.wrote

题型:不详难度:| 查看答案
When you come into the exhibition hall,you can see a large board with a notice on it,saying visitors__________not to touch the exhibits.
A.will requestB.request
C.are requestingD.are requested

题型:不详难度:| 查看答案
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