All that can be done ____.A.has been doneB.have been doneC.have doneD.has done
题型:不详难度:来源:
All that can be done ____.A.has been done | B.have been done | C.have done | D.has done |
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答案
A |
解析
All作主语,指的是事情或抽象概念时,常用单数,谓语动词也用单数。 |
举一反三
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