Questions 22 to 25 are based on the conversation you have just heard.

A．It will stop automatically.
B．It will move on at the same speed.
C．It will gradually slow down.
D．It will keep a safe distance from the other trains.

A．The audience helped the pianist.
B．The audience shook the pianist’s hand.
C．The audience disliked the pianist’s performance.
D．The audience applauded the pianist’s performance.