听力原文:W: Do you know where Tom is? M: Sorry, I don't know. W: Oh, my God! M: What's the matter? W: He is supposed to be at the meeting a quarter later. But I can't find him anywhere. M: Oh, I remember something. John told me that Tom went out for lunch at ... er ... about a quarter to two and would not be back unitl 3:30. W: Then he will be late for the meeting. M: What's the time now? W: 3:00. When did the dialog take place?