听力原文:M: Last Tuesday when I was at Dr. Williams' office. I spent over an hour in the w
W: Really? Something must have come up that day?
Q: What do we know about Dr. Williams?
(17)
A.Dr. Williams is very busy on Tuesday.
B.Dr. Williams usually sees patients promptly.
C.Dr. Williams forgot his appointment with the man.
D.Dr. Williams didn't have an appointment with the man.