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题目
题型:不详难度:来源:
We have done things we ought not to have done and ________ undone things we ought to have done.
A.leftB.leave
C.will leaveD.leaving

答案
A 
解析
并列的谓语:have done和have left并列,省略 have. 
核心考点
试题【We have done things we ought not to have done and ________ undone things we ough】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
— Why weren"t you at the meeting?
    — I ________ for a long distance call from my sister in America.
A.was waitedB.was waiting
C.has waitedD.have been waiting

题型:不详难度:| 查看答案
The little boy is dirty from head to foot because he ________ in the mud all morning.
A.has playedB.is playing
C.has been playingD.was playing

题型:不详难度:| 查看答案
The new dictionaries are very useful. They ________ well and ________ already .
A.sell; have been sold out
B.sold; had sold out
C.sell; sell out
D.are sold; have been sold out

题型:不详难度:| 查看答案
It seems water ______ from this tap for some time. We’ll have to take it apart to put it right.       
A.had leakedB.is leaking
C.leakedD.has been leaking

题型:不详难度:| 查看答案
—Don’t you feel surprised to see Bruce at the meeting?
—Yes. I really didn’t think she ________ here.    
A.has beenB.had been
C.would beD.would have been

题型:不详难度:| 查看答案
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