we won't go home until we _________the work.A.do B.have done C.will do D.did 为什么选B?

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we won't go home until we _________the work.A.do B.have done C.will do D.did 为什么选B?
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we won't go home until we _________the work.A.do B.have done C.will do D.did 为什么选B?
we won't go home until we _________the work.A.do B.have done C.will do D.did 为什么选B?

we won't go home until we _________the work.A.do B.have done C.will do D.did 为什么选B?
因为这是将来发生的事,所以主句用将来时,从句要用一般现在时,而且你是要完成了才能回家,所以得用have done的形式表示完成时.
明白吗?

B have done 现在完成时,

we won't go home until we have done the work.
直到我们完成工作,我们才会回家


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