“全国交通安全日”就要到了，为提高同学们遵守交通法规的自觉性和自我保护能力以及培养同学们良好的文明交通行为习惯，亮亮的学校特别邀请了市交警队的刘警官担任主讲，开展以“路上危险知多少”为主题的交通安全宣传活动。
一、新情境 知识科普 在交通安全知识科普环节，刘警官向同学们介绍了几点主要的骑行规则。阅读刘警官的介绍，选择正确的答案。

Riding a bike is really exciting. Biking is fun and good exercise. It is good for our health. And bikes are small, cheap and easy to park. You can go to places far from your house, and you can go out to play with your friends. But when you ride a bike, remember that you share the road with cars. Car drivers sometimes don't pay attention to bike riders. Here are some special rules for bike riders on the road in China.
Children under 12 years old mustn't ride bikes.
You should always wear a helmet when you ride your bike.
Wear clothes with bright colours so the drivers can see you easily.
Do not ride your bike on the pavement. Ride on bike paths.
Always ride on the right side of the road.
When you ride with friends, do not ride next to them. Ride one after the other.
Wheel(推) your bike across zebra crossings.
When you plan to turn or stop, use hand signals(信号) to let others know.
()1. Who do the rules protect?
A. Bike riders.
B. Car drivers.
C. Bus drivers.
()2. What should bike riders do when they want to turn?
A. Look back first.
B. Use a hand signal.
C. Stop and then turn.
()3. Which of the following pictures is NOT safe according to the article?

()4. Why does the article tell us these rules?
A. To teach us traffic rules.
B. To ask us to ride bikes more often.
C. To keep us safe on the bike.

1. A 2. B
3. B 解析 由“Wheel your bike across zebra crossings.”可知，车手应下车推着自行车穿过斑马线，故选 B。
4. C