第30题: [单项选择]The professor could hardly find sufficient grounds ___________ his arguments in favour of the new theory. A. to be based on B. to base on C. which to base on D. on which to base 参考答案:D 答案解析:[译文]教授几乎找不到足够的理由作为其论据的基础以支持这种新理论。
[题解]base sth.on…为固定搭配,[D]中的介词on放于指代sufficient grounds的which前,正常语序