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

A．He has already finished studying.
B．He’s taking a break from studying.
C．He’s finding out some information for a friend.
D．He was assigned to watch a program by his professor.

A．They are checked out.
B．They are specially coded.
C．They are inspected by the guard.
D．They are marked with colored labels.