问题
单项选择题
He put forward a theory,（）of great importance to the progress of science of technology
A.I think which is
B.which I think is
C.which is I think
D.I think it is
答案
参考答案：B
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He put forward a theory,（）of great importance to the progress of science of technology
A.I think which is
B.which I think is
C.which is I think
D.I think it is
参考答案：B
倍