问题

How can you expect him to make any improvement____ you never give him a chance to have a try?

A:unless
B:when
C:until
D:even if

正确答案是：

同类题型

下列各句中，没有病句的一句是（）

Would you please tell us something about the Group of Eight? — Well, the G8 is an international organization ______ the richest countries of the world.

You’ve left the light on.—Oh.So I have.________and turn it off

下列文化常识的解释正确的是（）

He ___ in a minute.Ask someone else to do it