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.—John,yougoouttoplayuntilyourhomework.—OK,Mum..Amust;finishesB.can’t;isfinishedC.can’t;hasfinishedD.needn’t;finishes

题目详情
.— John,you _____ go out to play until your homework __________ .—OK,Mum.
.Amust; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes
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答案和解析
选 B can’t; is finished
homework,是被做完的,所以一定要用被动语态.这里只有 B 里的 is finished 是被动语态.
C has finished 是现在完成时,不行.
如果要用现在完成时,要说:until your homework has been finished.