问题
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 it is
B:which I think it is
C:which I think it
D:I think it is
正确答案是：
同类题型
Chen Long and Zhen Zidan have much _____________. And they often play similar roles in the movies.
She provided her father all the food and money he wanted.
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