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题目
题型:不详难度:来源:
He has made another wonderful discovery, _____ I think is of great importance to science.   
A.whichB.whatC.whenD.that

答案
A
解析
考察定语从句。Which指代先行词discovery在句中作主语。What不是定语从句的关系词,when是关系副词,that不能引导非限制性定语从句。故A正确。
核心考点
试题【He has made another wonderful discovery, _____ I think is of great importance to】;主要考察你对定语从句等知识点的理解。[详细]
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