题目内容：

听下面一段独白，回答以下小题。

1.How long should people put their burnt hands in cool running water?

A. About 20 minutes. B. About 10 minutes. C. About 12 minutes.

2.What should people do to bring down the temperature?

A. By keeping warm. B. By shutting the window. C. By taking a bath.

3.How should people deal with backache?

A. Lie down. B. Go to bed. C. Keep moving gently.

4.What is the speaker mainly talking?

A. Simple treatments for some situations.

B. Mistakes in first aid.

C. Cases calling for first aid.