He has made another wonderful discovery, ____ of great importance to science.A.

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问题 He has made another wonderful discovery, ____ of great importance to science.

选项 A. which I think is
B. which I think it is
C. I think which is
D. of which I think it is

答案A

解析“which I think is”是“which”引导的一个非限定性定语从句,此处修饰“discovery”。故选A。此句意为:他已经创造了另外一个伟大的发现,我认为对科学是至关重要的。
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