Questions 11 to 18 are based on the conversation you have just heard.

A．Because they can fly very high.
B．Because they can carry larger freight over within a shorter time.
C．Because they are the newest form of transport.
D．Because they can go somewhere that cannot be reached by other transports.

A．That the man can rely on her instead.
B．That the man should not bother the director with this.
C．That the director will help him out.
D．That the man had better not expect much of the director.