1. (2018六下·龙岗期末) 以下为不文明现象，请为每个场景选择合适的文明提示语。

A. It's dangerous to climb the fence.

B. Please look after your dog.

C. Don't eat on the subway.

D. You shouldn't talk loudly in public places.

1. （1）
3. （2）
5. （3）
7. （4）