Questions 11--13 are based on the following news on teeth protection. You now have 15 seconds to read Questions 11--13.

How many decayed teeth does Dr. Faustick have

A．The credit manager’s responsibility.
B．The supervisor’s responsibility.
C．The working procedures of a credit department.
D．The command and control in the credit department.

A．relaxed
B．frustrated
C．amused
D．exhausted