大学英语大学英语大学英语四级(CET4)2000年6月大学英语四级(CET-4)真题试卷
题目内容

The professor could hardly find sufficient grounds ________ his arguments in favour of the new theory.

2024-07-09

A.to be based on

B.to base on

C.which to base on

D.on which to base

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