三、选择恰当的句子补全对话
John: There is a lake... Look! The fish is so cute!
Chen Jie: John, be careful! 1.
(John falls into the water.)
John: Help! Help! 2.
(Chen Jie asks the police for help.)
Chen Jie: Excuse me! 3. He can’t swim.
Policeman: 4. I can help you.
(The police saves John.)
Policeman: Are you all right now?
John: Yes. 5.
A. Don’t worry.
B. I can’t swim.
C. Please help John.
D. Thank you.
E. Don’t go there.

1. E 2. B 3. C 4. A 5. D

四、小小安全宣传员
请你根据不同的生活场景，设计两条英文安全标语。

Place:
Safety tip:


Place:
Safety tip:

参考示例：
第一条：
Place: Playground
Safety tip: Don't chase each other on the playground.
第二条：
Place: Bus
Safety tip: Don't put your head out of the window.

本题是开放性英语实践题目，考察四年级学生对常见生活场景的英文表达、基础否定祈使句的运用，参考示例使用了简单的"Don't+动词原形"的祈使句结构，选择小学生熟悉的日常场景，搭配对应简单易懂的安全提示即可，答案不唯一。