问题

How can you expect him to make any improvement ________ you never give him an opportunity to have a try?

A:unless
B:when
C:until
D:while

正确答案是：

同类题型

There ________ a basketball game in our school tomorrow. —Great!

I am looking for a W.C , but I can’t find __________ .

The terrible noise is ____ me mad.

It was warm and nice that evening. I stayed awake until eleven in order to have a good look at the moon by myself.

There are lots of shops on _________ of thestreet.