问题

The professor managed to find somegrounds _________his arguments．

A:to be based on
B:to base on
C:which to base on
D:on which are based

正确答案是：

同类题型

The students wonder____good the course will do totheir future jobs

It is the prevention of disease ______its successful treatment that has led to the rapid increase of the world’s population.

I __________ read books rather than go to the countryside this weekend.

The question is not easy. It’s very_______ .

下列各组词语中没有错别字的一项是（）