Questions 5 to 7 will be based on the following news item.

A．Because they are natural conductors of concerts.
B．Because they want to show that they understand the music.
C．Because only in this way can they enjoy it fully.
D．Because they cannot grasp it if they don"t perform it.

A．She could forget about people, so she won"t blush.
B．She could know where to exit, which makes her feel safe.
C．She could know how many people have left the room.
D．She could get more confidence because the professor is standing there.