Question

be careful when you go across the road。

You Be careful when you go across the road her
You ____ be careful when you go across the road here the traffic lights aren''t working

Answer 1

You ____ be careful when you go across the road.Here the traffic lights aren''t working.
答案：must
中文：在过马路时,你一定要注意安全.这里的红绿灯运转不灵.