问题

t facts, a person can not form a correctopinion, for he needs to have actual knowledge ______his thinking .

A:on which to bebased
B:onwhich to base
C:which to bebased
D:which to base

正确答案是：

同类题型

The student insisted that he _____ nothing wrong and would never _____ the teacher.

What surprised me was not what he said but _______ he said it.

下列各句中，没有语病的一句是（）（

Mr. Wang’s never been to Canada, has he—. He went there on businesslast week.