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

A．They are required to attend classes twenty hours each week.
B．They must be taught during spring and autumn.
C．They are required to look after themselves.
D．They are required to learn many subjects.

A．He should exercise everyday.
B．He should relax in a chair in the afternoon.
C．He should go on a strict diet.
D．He should get up early in the morning.