hurry up ,the bus is coming ---oh,no.we mustn't cross the street()the traffic are green.A after B since C while D until 要说为什么

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hurry up ,the bus is coming ---oh,no.we mustn't cross the street()the traffic are green.A after B since C while D until 要说为什么
hurry up ,the bus is coming ---oh,no.we mustn't cross the street()the traffic are green.
A after B since C while D until 要说为什么

hurry up ,the bus is coming ---oh,no.we mustn't cross the street()the traffic are green.A after B since C while D until 要说为什么
D
...之前
--快点,车来了
--不,在红绿灯变绿灯之前我们不可以过马路.
A ...之后
B 因为
C 当
都不符合题意

选D.
not..until 直到..才..
译文:-快点,公车来了!
-哦,别急,(直到)绿灯亮了我们才能过街。