The professor could hardly find sufficient grounds______his arguments in favor of the new theory.

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问题 The professor could hardly find sufficient grounds______his arguments in favor of the new theory.

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

答案D

解析
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本试题收录于: 英语题库普高专升本分类
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