Part B Directions: You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE. 听力原文：M: I have been studying too much and need a change. So I've just made plans to go away during January break. W: Really? Where are you going? M: I'm planning to visit New Mexico. W: My sister and I vacationed there last year and we had a great time. M: Did you get into Albuquerque? W: Sure. Whenever we were skiing. M: Is it far from the mountains? W: Not at all. Though Albuquerque is on a high flat plateau. There are even higher mountains near it. Just half an hour away from the city there are snow - covered slopes. M: Well. As the mountains are just thirty minutes away, I guess I should take 'my ice skate and my skis. W: Definitely. M: I heard that the weather there is great. W: It is. No humidity, moderate temperatures, but you do need to be careful about high altitude. M: What should I do about that? W: Oh, just take it easy for a few days. Don't go hiking up the mountains or exercise too vigorously. Just do everything gradually. M: I'm sure I will be fine. And I will let you know all about my trip when I come back. What's the main purpose of the man' s trip?