F: Excuse me, do you know when the train will arrive? ,M: I'm sorry, the train is behind schedule.
(A) F: You mean the train that has arrived is crowded, right? (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: Although the train is late, it has arrived. (D) F: Do you mean the train that has arrived is on time?
B