新华小学四(5)班的李老师邀请了本市交通局的交警李叔叔到班级开展交通安全知识的宣讲。你也来了解一些有用的知识吧！

Miss Li: Children, let's welcome Uncle Li.
Lily: Uncle Li, what do you do every day?
Uncle Li: My work is very important. I help cars, buses and bikes go the right way. I use special hand signals(手势) to tell them when to stop and when to go. I also help people find their way if they get lost.
Tom: I want to help them too.
Uncle Li: Haha! I drive around in the police car to make sure everyone is following the traffic rules.
Children: We all follow the traffic rules.
Uncle Li: Good kids. If there's a car accident(事故), I help keep the area safe and figure out what happened. And then we can prevent(防止) more accidents in the future.
Children: Uncle Li, you are very busy.
Uncle Li: I visit schools and talk to kids about how to be safe when crossing the street or riding bikes. I want to make sure you all know the rules to stay safe.

(一)根据对话，勾选出李叔叔每天的工作内容。
()1. help cars，buses，trains and bikes go the right way
()2. use special hand signals to tell cars when to stop and when to go
()3. drive around in the police car and check
()4. help keep the accident area safe
(二)道路上行驶的每一辆车都有着专属的“身份标识”——车牌。李叔叔为大家展示了几组车牌,你能根据车牌信息判断这些车辆分别来自哪里吗？请匹配并连线。
1. 苏E·887
2. 京C·E49
3. 沪A·2Q6
4. 苏A·058
A. Shanghai
B. Suzhou
C. Nanjing
D. Beijing

【项目化学习三】
（一）勾选 2、3、4 解析：对话中李叔叔提到“help cars，buses and bikes go the right way”，未包含“trains”，因此 1 错误；对话明确提到“I use special hand signals to tell them when to stop and when to go.”，与 2 描述一致；对话中李叔叔说明“I drive around in the police car to make sure everyone is following the traffic rules.”，即开车巡逻检查，与 3 描述一致；对话提到“If there’s a car accident，I help keep the area safe”，与 4 描述一致。
（二）1—B 2—D 3—A 4—C