(經(jīng)典回放)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 which is

答案：A
提示：

句意為“他又有了一個了不起的發(fā)現(xiàn)，我認(rèn)為這個發(fā)現(xiàn)對于科學(xué)界來講是非常重要的”。本句后面部分應(yīng)為定語從句，I think作插入語，which在從句中作主語，修飾discovery。


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