Ithinkthathemustbelookingupthei

发布时间：2020-07-10 16:56:25

I think that he must be looking up the information in the library, _____?













A.isn't he












B.don't I











C.do you











D.must he

网友回答

A解析must表示猜测时以时间为依据。I think that…进行附加疑问句时要与从句中的主谓一致。所以
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