听力原文:W: I'm afraid Dr. Johnson won't be able to see you then. His appointment book is
M: Oh, but I don't have to see him. I'll just leave my teeth in his office and he can look at them when he had time. They are false teeth!
Q: What is Dr. Johnson?
(19)
A.He's a professor.
B.He's a surgeon.
C.He's a physician.
D.He's a dentist.