【題目】 He made another wonderful discovery, _____ of great importance to science．

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

C. which I think it D. I think is

【答案】A

【解析】

試題分析：考查插入語(yǔ)：句意：他做出了一個(gè)重大發(fā)現(xiàn)，我認(rèn)為這對(duì)科學(xué)是非常重要的，which引導(dǎo)的是非限制性定語(yǔ)從句，I think是插入語(yǔ)，在which后面，去掉I think可知which是定語(yǔ)從句的主語(yǔ)，it是多余的，選A 。

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