F: May I meet Mister Lee? We had an appointment. ,M: Sorry, Mr Lee is out. It's 9:15 now and he will be back at 9:45.
(A) F: Really? Mr Lee is not out but I will wait 15 mintues? (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: Okay.  He will be back at 9:30 and I will wait 30 mintues. (D) F: So, it's 8:45 now and he will be back at 9:45. And I will wait one hour!
B