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I don't think he could have done so much homework last night, ?A.do IB.did heC.h

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I don't think he could have done so much homework last night, ?A.do IB.did heC.h

I don't think he could have done so much homework last night, ________?

A.do I

B.did he

C.has he

D.could he

试题答案

B