Road safety.We walk in the street every day.But it is dangerous to walk in the street,in a way.Every year,there are hundreds of traffic accident.So we should be careful when we walk in the street or cross the road.First,we should cross the road at the crossings.Then we should cross the road carefully.But we must see left or right to make sure that there are no cars running on the road.And you should remember to cross the road when the green light is on.You mustn't play or run while you are crossing the road.We should remember these all the time so that we can be safe in the street or on the road.