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He made another wonderful discovery, of great importance to science. A. which I

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He made another wonderful discovery, of great importance to science. A. which I

He made another wonderful discovery, ________ of great importance toscience.

A. which I think isB. which I think it is

C. which I think it D. I think which is

 

试题答案

答案:A

解析:
本题考查定语从句中插人语的用法,因为插入语必须位于引导词之后,所以D项不对。因为which作定语从句的主语,所以不能再用it,B、C明显不对。

 

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