【答案解析】[听力原文]6-7 F: Thomas is absent from his class today. Do you know what happens to him? M: I heard he has caught a severe cold. He must be in bed by now. F: Has he been to the hospital? He's got to be careful, for there is a flu these days in the city. M: Sure, I am calling to tell him to be careful. F: We'd better buy some fruit and pay him a visit.