听力原文: Mr Baker is very happy to see Miss Green every morning because she is a good secretary. One Monday Miss Green didn't crone to work because she was ill. She had a terrible cold and a bad headache, so she phoned Mr Baker. ( The telephone rings. ) W: Good morning, Mr Baker. M: Good morning, Miss Green. What's wrong? Where are you? W: I am at home. I'm ill. I'm afraid I've got a terrible cold and a bad headache. M: I'm very sorry to hear that. Well, you'd better stay at home. W: Thank you, Mr Baker. See you tomorrow. M: See you tomorrow. Goodbye. W: Goodbye, Mr Baker. Where did the dialogue happen?