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Don't drive too fast;
Don't play on the road;
Don't make a call;
Don't make a wrong turn;
……
Look and say.
truck n.
reflector n.
injury n. (对躯体的)伤害，损伤
signal n.信号，暗号
notice n. 注意，理会；v.看到，注意到
in case of 如果，假使
look out 小心(be careful)
in a word 总之
safety n.安全，平安
Look and guess:
What is the passage going to talk about?
When you read a passage, your knowledge of the topic will help you understand it better.
The bicycle riders must pay attention to the traffic around them. The bicycle riders must know traffic signals. The bicycle riders must know and obey the safety rules. The bicycle riders must wear helmets to protect their heads.
care for，注意
What rules should bicycle riders know?
The bicycle is one of the most important vehicles in th world. In every country people use bicycles for work, for sport or just for fun.
Bicycle riding is good exercise. It helps people become fit. Bicycle riding can make the riders' hearts and lungs strong. It is also good for th environment because bicycles do not cause pollution.
Bicycles share the road with cars and trucks. Drivers do not always notice bicycles. So bicycle riders must pay attention to the traffic around them and know traffic signals. They must know and obey the safety rules. They must war helmets to protect their heads. When riding at night, they must wear light-colored clothes, and have lights in the front and reflectors on the back of their bicycles. A bicycle accident may be serious. In case of an accident, bicycle riders should know how to give first aid. If an injury is serious, they must call 120 for help. In a wod, the best way to be safe is to be careful.
Paragraph 1: Bicycles are very popular.
Read Paragraph 1 and underline the topic sentence.
The bicycle is one of the most important vehicles in the world. In every country people use bicycles for work, for sport or just for fun.
Paragraph 2: Bicycle riding is good for health and the environment.
Read Paragraph 2 and underline the topic sentences.
Bicycle riding is good exercise. It helps people become fit. Bicycle riding can make the riders' hearts and lungs strong. It is also good for the environment because bicycles do not cause pollution.