He has made another wonderful discovery，__________of great importance to science．A.which I think isB.which I think it isC.I think which isD.ofwhich I think it iS
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.ofwhich I think it iS
B.which I think it is
C.I think which is
D.ofwhich I think it iS
参考解析
解析：which I think is是which引导的一个非限定性定语从句，此处修饰discovery。故选A。此句意为他已经创造了另外一个伟大的发现，我认为对科学是至关重要的。
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