DoctorSmithhasmadeanotherwonderful

发布时间：2020-07-09 22:52:41

Doctor Smith has made another wonderful discovery ________ great importance to science.













A.which I think is of












B.which I think it is of











C.that I think is of











D.I think which is of

网友回答

A解析which作is of的主语，I think作插入语时，疑问词放在前面．
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