问题

Hey,man. You can’t cross the street now. You have to wait ___the traffic lights turn green.

A:when
B:after
C:until
D:while;

正确答案是：

同类题型

You shouldn’t make mistakes .

_______ she wClinton.

Waiter: Here is the steak you ordered. Please _________and enjoy yourself.Customer: Thank you.

160. It seemed that there was strange soundoutside. We ________ carefully but_____nothing.

－Can I justhave a try?－Sure. Itdoesn’tif you give a wronganswer.