1 . 听下面一段独白，回答以下小题。
1. What is the speaker talking about?

A．The history of paper.

B．The materials of paper.

C．The importance of paper.

2. How did people keep records before writing was developed?

A．By carving words on animal bones.

B．By carving words on metal pots.

C．By putting a number of stones together.

3. What is the disadvantage of using bamboo to keep records?

A．It was expensive.

B．It was heavy to carry.

C．It can’t be kept long.