问题

Hurry up ! The bus is coming . —– Wait a minute. Don’t cross the street_________ the traffic lights are green.

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

正确答案是：

同类题型

____________ himself in work makes it possible for him to achieve his goal.

It ________ Bob drives badly

She will stop showing off if no notice ______ of her

______ your aunt— She is a doctor.

We have just heard a warning on the radio _____________ a typhoon may be on its way