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题目内容 (请给出正确答案)
He has made a discovery, ___ of great importance to the progress of science and technology.

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

C.think which is

D.of which I think it is

参考答案

参考解析
解析:本题主要考查定语从句,全句意为“他有了一项新的发现,我认为这项发现对科技进步非常重要。”I think 作插入语,去掉不影响句意,which在这里作关系代词代替discovery,放在句首在从句中作主语,即:I think the discovery(which)is of great importance..。不需要再有it作形式主语。

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定语从句
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