The professor could hardly find sufficie

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问题 The professor could hardly find sufficient grounds _____ his arguments in favor of the new theory.A.on which to baseB.which to base onC.to base onD.to be based on

选项 A.on which to base
B.which to base on
C.to base on
D.to be based on

答案 A

解析 句意:教授难以找到充足的论据来证明他赞成新理论的论点。此句中的先行词which在从句中作base on的宾语,此处考查的是名词+介词+which/whom+动词不定式结构的定语从句。
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