第7题: [单项选择]Questions 14-17 are based on the following dialogue.What is the main purpose of the man’s trip A. To improve his skating techniques. B. To climb mountains. C. To take a vacation. D. To learn to ski. 参考答案:C 答案解析:[听力原文]14-17 M: I have been studying too much and need a change. So I have just made plans to go a