Every day some people are killed while they are crossing the roads. __1__ of these people are old people and children. Old people are often killed（被杀死）because they can't see or __2__ very well. Children are killed because they are not __3__. They forgot to look and listen before they __4__ the roads.

　　A car or a bus can't stop __5__. If a car is going very fast, it will travel many metres __6__ it stops. Some people don't always understand this. They think a car can stop __7__ a few seconds. It is difficult to __8__ how fast a car is moving. The only way to cross the roads safely（安全地）is to look __9__ ways, right and left. Then if the roads are __10__, you can cross them.

　　Every one of us must be more careful when you are crossing a road no matter（无论）you are a driver or a passer-by（过路人）. And all the drivers must drive more carefully and slowly when they are driving.