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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 wonderfuldiscovery, _________ of great importance to science.

A. which I thinkis                               B.which I think it is 

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

 

试题答案

【答案】

A

【解析】I think 是插入语,  which 引导一个非限制性定语从句, 在从句中作主语.