听下面一段对话, 回答第1至3题。 1. What is Mr. Carson doing when the man calls him? A. Having a talk with his customer. B. Having a meeting. C. Having lunch. 2. What's the man's telephone number? A. Hong Kong-68261427 extension 4063. B. Hong Kong-68261427 extension 4066. C. Hong Kong-68261427 extension 4036. 3. When can Mr Carson ring the man according to the woman? A. As soon as he returns from lunch. B. As soon as he returns from meeting. C. As soon as he knows about it.