Question

He made another wonderful discovery, ______ of great importance to science.

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

Answer 1

B

試題分析：考查插入語：句意：他做出了一個重大發(fā)現(xiàn)，我認(rèn)為這對科學(xué)是非常重要的，which引導(dǎo)的是非限制性定語從句，I think是插入語，在which后面，去掉I think可知which是定語從句的主語，it是多余的，選B。
點(diǎn)評：插入語用法歸納 插入語用法很多,在句子中的位置比較靈活,在學(xué)習(xí)中應(yīng)當(dāng)認(rèn)真去體會。插入語可以是用簡短的句子結(jié)構(gòu)作插入語。這類短語有:I think, I hope, I guess, I believe, I suppose, I wonder, I tell you, I say, I'm afraid, I'm sure, you see, you know, as you know, that is, that is to say, what's more等等,它們可以置于句中或句尾。