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

A．People enjoy shopping in them.
B．People spend little time in them.
C．People are more likely to buy something in them if time is limited.
D．People spend too much time reading articles about quick cures sold in drugstore.

A．Mark the latest homework assignment.
B．Put a cancellation notice on the classroom door.
C．Make an appointment with the doctor.
D．Return some exams to his students.