Every year many people get hurt or lose their lives in traffic accidents. How can we keep safe when we are walking near the roads? First, we must obey the traffic rules. We must cross the street only when we see the green “ walk” sign. Second,before we cross the road, we must stop and look both ways---look left, look right and look left again. Third, we must never play on the street. Last, it’s good to help children and old people cross the road. All of us should be very careful when we are walking near traffic.
根据短文内容，判断正(A)误(B)。
We must not ride skateboards（滑板） on the street.
It’s not good to help children cross the road.
We must not cross when we see the green “ walk” sign.
We must stop and look both ways before we cross the road.
We can play football when there is no car on the street.