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The scientist has made quite a few discoveries, ______ of great importance to the whole world.
A.which I think they areB.which I think are
C.I think which areD.that I think they are
B
此题考查非限定性定语从句。非限定性定语从句不能用关系代词that来引导,因而排除D.项;[C]项语序不对;在以Which开头的[A]、B.项中,关键要识别出插入语“I think”,这样显然[A]项中的they为多余的词,因此B.项为正确答案。
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