We have done things we ought not to have done and ________ undone things we ough
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．left | B．leave | | C．will leave | D．leaving |
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答案
| A |
解析
| 并列的谓语：have done和have left并列，省略 have． |
举一反三
— Why weren"t you at the meeting?
— I ________ for a long distance call from my sister in America.| A．was waited | B．was waiting | | C．has waited | D．have been waiting |
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The little boy is dirty from head to foot because he ________ in the mud all morning.| A．has played | B．is playing | | C．has been playing | D．was playing |
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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 |
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It seems water ______ from this tap for some time. We’ll have to take it apart to put it right. | A．had leaked | B．is leaking | | C．leaked | D．has been leaking |
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—Don’t you feel surprised to see Bruce at the meeting?
—Yes. I really didn’t think she ________ here. | A．has been | B．had been | | C．would be | D．would have been |
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