问题

Do you have any idea when the project will be carried out?—No, but I have heard that it was not until last month _______ it was approved.

A:that
B:when
C:since
D:before

正确答案是：

同类题型

The government hastaken measures to____the high pricesof daily goods to keep the market stable.[ ]

下列各句中，没有语病的一句是（）

_he tried many times, he stillcouldn’t move the heavy box.

___ of 40,000 per year

In my opinion, all Mr White ____ good to his students in his class at present. He is very strict in their study.