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

I suppose by the time I come back next year, all these old houses south of the Baoshehe River ________ down

The girl was knocked ______ her bike by a carShe shouted ______ the driver angrily

How old is Steve—He is ____________ and he has an ___________ sister.

The car Tom was ________ was once ________ his uncle.[ ]

I’m in a bad mood these days. —