1 . 听下面一段独白，回答以下小题。
1. What was Willis Conover?

A．A jazz musician.

B．A radio announcer.

C．A music producer.

2. When was Willis told that he should work in radio?

A．When he acted in a school play.

B．When he attended a jazz concert.

C．When he entered a spelling competition.

3. Which city was the center of a very important jazz movement?

A．Washington D.C.

B．New York City.

C．Buffalo.

4. Who was the heart of jazz according to Willis?

A．Duke Ellington.

B．Count Basie.

C．Louis Armstrong.