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

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

DoctorSmith has made another wonderful discovery ________ great importance toscience.

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

 

试题答案

答案:A

提示:

Ithink 作插入语。