The physicist has made a discovery, _______ of great importance to the progress

游客2024-09-04  9

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 逗号后为非限制性定语从句,修饰a discovery,用which连接,I think可视作插入语,故答案为C。引导词which在从句中可充当句子成分,D项中的it多余;that不能引导非限制性定语从句,B不正确。
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