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 I
B.did he
C.has he
D.could he
试题答案
B

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
B