【用英语说】我们必须等绿灯,然后才能过马路.
问题描述：
【用英语说】我们必须等绿灯,然后才能过马路.
答
we can't cross the road untill the green light
答
We must wait for the light to turn green brfore going across the road.
答
We can not cross the road unless it turns to green
答
We must wait for the green, then cross the road
答
I can only cross the road after the green light on.我们在绿灯后才能过马路.
答
We have to wait for the green, then to cross the road.
答
Cross the road when it is green.