一、句型热身。
1. 你必须在人行道上等待绿灯。
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You must wait for the green man on the pavement.

2. 为了保持安全，你应该当心小汽车和自行车。
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To keep safe, you should look out for cars and bikes.

3. 你绝不能在马路上玩耍或者跑步。
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You mustn't play or run on the road.

4. 为了保持计算机室干净整洁，你不准带任何食物或饮料入内。
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To keep the computer room clean and tidy, you mustn't take any food or drinks into the room.

二、写作练习。
　　你们学校正在举行“马路安全小卫士”评选活动，你认为李华可以当选，请用英语为他写一段推荐词。提示：可围绕遵守交通规则、出行好习惯等方面展开合理想象，组织语言，不少于6句话。
　　Hello, everyone! I'd like to recommend(推荐) Li Hua for this award. Li Hua is very careful when he's on the road.
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Hello, everyone! I'd like to recommend Li Hua for this award. Li Hua is very careful when he's on the road. First, he always looks for a zebra crossing. Then he looks at the traffic lights and waits for the green man. He crosses the road when he sees the green man. Some children run or play football on the road. But he never runs quickly on the road. He follows the rules and stays safe on the road.