听下面一段材料，回答第1至4题。 1. What does the man think of business entertaining? A. It is a way of making friends. B. It is the key to a successful business. C. It is a way to show respect for clients. 2. How does the man usually entertain his clients first? A. By showing them around. B. By inviting them to dinner. C. By taking them to a bar or a club. 3. What does the man drink at lunchtime? A. Mineral water. B. Alcohol. C. Tea. 4. What do we know about the man? A. He thinks it is impolite to refuse a drink. B. He seldom invites clients to his home during the week. C. He often arranges leisure activities for foreign clients at weekends.