The physicist has made a discovery, ______ of great importance to the progress of science and technology.

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问题 The physicist has made a discovery, ______ of great importance to the progress of science and technology.

选项 A、I think which is
B、that I think is
C、which I think is
D、which I think it is

答案C

解析 插入语题。题意:“这名物理学家有一个发现,我认为它对科技进步具有重大意义。”这里I think是插入语。去掉插入语,原文为:…which is of great importance…。因此,C为正确项。
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