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

A．How to keep young.

B．How to improve memory.

C．How to open our mind.

2. What is the key to achieving this goal?

A．Going back to school.

B．Playing no attention to age.

C．Using the mind as much as possible.

3. What did the man who entered school at 70 become later?

A．An active lawyer.

B．A successful doctor.

C．A highly paid artist.