◎ 题干
The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
A.to be based onB.to base on
C.which to base onD.on which to base
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.A.to be based onB.to base onC.which to base onD.on which to bas…”主要考查了你对  【状语从句】【限制性定语从句】【主语从句】【同位语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。