1 . 听下面一段独白，回答以下小题。
1. What does the speaker tell us about the Tracker Star-Watching Center?

A．It opens all day.

B．Its ticket is free.

C．It’s a public museum.

2. What do visitors do first during evening sessions?

A．Learn about the Center and its programs.

B．Listen to lectures from the expert staff.

C．Watch the sky outside the Center

3. What should visitors prepare for watching the stars there?

A．Telescopes.

B．Guide books.

C．Warm clothes.