问题

I would appreciate ______ if you could letme know in advance when the meeting will be held.

A:that which
B:this
C:it
D:you

正确答案是：

同类题型

The safety of food has become one of the _________ problems in our daily life.

Christina wasn’t saying anything, but the professor smiled at her _______she had done something very clever

You need ________ fit.

It’s careless ________ him to make the same mistake again. I think it important ________ him to be more careful next time.

We’d swe seen