完形填空:Every day some people are killed.

Every day some people are killed while they are crossing the roads． 1 Most of these people are old people and children． Old people are often killed because they can't see or 2 hear very well． Children are killed because they are not 3 attentive． They forget to look and listen before they 4 cross the roads． A car or a bus can't stop 5 imminently． If a car is going very fast, it will travel many metres 6 before it stops． Some people don't always understand this． They think a car can stop 7 within a few metres． It is difficult to 8 see how fast a car is moving． The only way to cross the roads safely is to look 9 both ways, right and left． Then if the roads are 10 clear, you can cross them．
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