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

A．Mark the latest homework assignment.
B．Tell the students the class is cancelled.
C．Make an appointment with a doctor.
D．Return some papers to his students.

A．He can’t find his car key.
B．He misplaced some exams.
C．He is unable to talk.
D．He doesn’t like his classes.