【答案解析】[听力原文]17-20 If you only need to travel a short distance, the quickest way to travel in most cities is to walk. During working hours (between approximately 9:00 a.m. and 5:00 p.m. Monday through Friday), the traffic is very heavy on most city streets, sometimes, coming to a complete stop in places. As a result, many people prefer to walk. You should therefore be aware of some of the traffic laws. It is against the law in many cities to cross the street at any place except at the corner. These rules may not be followed as closely, because the traffic is usually not so heavy. However, the purpose of the laws is to provide for the safety and protection of the people. Remember to look both ways for automobiles when you cross the street.
[考点] 推断题 [解析] 因为城市交通堵塞严重，步行最方便。故本题答案为B。
单选题
When is the heavy traffic hour on most city streets according to the passage?
【正确答案】
A
【答案解析】[考点] 细节题 [解析] 周一到周五的9:00—5:00最为繁忙。故本题答案为A。
单选题
Which of the following is not against the laws in big cities to cross the street?
【正确答案】
B
【答案解析】[考点] 推断题 [解析] A、C项均为违背法律的。故本题答案为B。
单选题
Why may people not follow closely the traffic laws in small towns?