1 . 听下面一段较长对话，回答以下小题。
1. What’s the man’s dream?

A．To be an artist.

B．To be a teacher.

C．To be a scientist.

2. What do we know about Copernicus’ theory?

A．It proved that the earth was still.

B．It was influenced by Newton and Einstein.

C．It is the basis of ideas about the universe today.

3. What was thought to be the center of the universe at the time of Copernicus?

A．The earth.

B．The sun.

C．God.

4. Why did Copernicus publish his theory when he was dying?

A．He wasn’t sure of his theory until then.

B．He was afraid of being punished.

C．His friends told him not to publish it.