题目内容

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
解析:

I think在句子里经常是插入语,关系词which在定语从句中作主语,故选A项。


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