1 . 听下面一段独白，回答以下小题。
1. Where is the line painted on ships?

A．At the bottom.

B．On the side.

C．At the top.

2. What do we know about the line painted on ships?

A．It became law in the 18th century.

B．It was named after a 12th century lawmaker.

C．The water level can’t go above the line for the safety of the ships.

3. Why does the speaker give the talk?

A．To introduce.

B．To advise.

C．To inspire.