听下面一段材料,回答第1至3题。 1. What is the man? A. A businessman. B. A salesman. C. A scientist. 2. Where does this conversation most probably take place? A. On a train. B. On a bus. C. On a plane. 3. Why is the woman traveling? A. She is traveling on holiday. B. She is traveling on business. C. She is traveling to give some lectures.