M: You fix the time at 4:45, but shall I change it to 5:30? ,F: I'm afraid it's too late. I have to pick up my son at 7:00 o'clock. But I can manage to arrive at 5:00 o'clock.
(A) M: OK then, I will make it on time. But since when have you been picking up your son at 7:00? I didn't know that at all. (B) M: OK, see you at 7:00 p.m. (C) M: Why did you fix the time at 5:00? (D) M: I’m sorry, I don’t understand. Could you say it again?
A