The professor could hardly find sufficient grounds

題目

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

A.on which to base

B.which to base on

C.to base on

D.to be based on

答案：

D

[譯文]教授幾乎找不到足夠的理由作為其論據(jù)的基礎(chǔ)以支持這種新理論。[題解]base sth.on…為固定搭配，[D]中的介詞on放于指代sufficient grounds的which前，正常語(yǔ)序應(yīng)是 to base his arguments on sufficient grounds，因此[D]正確。