1 . 听下面一段独白，回答以下小题。
1. What is wrong with the lake?

A．Its color is strange.

B．There are not enough fish there.

C．A chemical pollution happened there.

2. What probably caused the trouble?

A．People's action.

B．The weather.

C．Fish.

3. What will listeners probably hear next?

A．Sports news.

B．Update information on the lake.

C．The weather report.

4. What does the report mainly talk about?

A．The pollution of the lake.

B．The colour change of the lake.

C．Warnings to children.