题目内容：

听下面一段独白，回答以下小题。

1.What is the main purpose of the loud noises?

A.To warn people outdoors to get inside.

B.To get people’s attention inside their homes.

C.To inform people without radios about danger.

2.Who decides to turn on the system?

A.Local media. B.Local officials. C.The national weather service.

3.Where does the speaker advise people to go after hearing a warning?

A.To a window. B.To a public shelter. C.To the middle of a building.

4.What is the main topic of the talk?

A.A weather report.

B.A warning system.

C.The safety steps in bad weather.