问题
选择题
He made another wonderful discovery, _____ of great importance to science. [ ]
A. which I think it
B. which I think it is
C. which I think is
D. I think which is
答案
答案:C
He made another wonderful discovery, _____ of great importance to science. [ ]
A. which I think it
B. which I think it is
C. which I think is
D. I think which is
答案:C