题目内容:
He has made another wonderful discovery, ____ of great importance to science.
A. which I think is B. which I think it is C. I think which is D. of which I think it is
参考答案:
答案解析:
He has made another wonderful discovery, ____ of great importance to science.
A. which I think is B. which I think it is C. I think which is D. of which I think it is