阅读理解。
Every year thousands of people get hurt or die when they are crossing the road. Most of these people
are old people and children. Old people often get hurt or die because they can't see or hear very well.
Children usually meet with accidents because of their carelessness. They forgot to look and listen before
they cross the road.
How can we lessen (减少) traffic accidents? All of us must obey the traffic rules. For the drivers,
they shouldn't drive too fast. If they drive too fast, it will be very difficult to stop the cars in a very short
time. For the pedestrians (行人), it's very important to be careful when they are walking on the road.
Therefore, when we walk across the road, we must try to walk along the pavements. We must stop and
look both ways before crossing the road. Look left first, next look right, then look left again. Only when
we are sure that the road is clear, we can cross it. The right way to cross the road is to walk quickly. It's
not safe to run. If people run across the road, they may fall down. Teens should try to help children, old
people or blind people to cross the road, and never play in the street.
1. Which of the following is NOT the right way to cross the road? [ ]
A. Stop and look both ways.
B. Run quickly.
C. Make sure that the road is clear.
D. Walk quickly.
2. Why do most old people often get hurt or die when they are crossing the road? [ ]
A. Because they can't see or hear very well.
B. Because they forget to look and listen.
C. Because they are not careful.
D. Because they often run across the road.
3. The best title for this article may be . [ ]
A. How to lessen traffic accidents?
B. How to cross the road?
C. Please obey the traffic rules.
D. Meeting with traffic accidents.
4. As a student, you can to try to lessen traffic accidents. [ ]
A. let drivers drive slowly
B. play in the street carefully
C. help children to cross the road
D. run across the road quickly
表示集合A的绝对补，A-B表示集合A与B的差，则A-B＝（）。