第30题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard. A. Fellow teachers. B. Freshmen of a university. C. Second-year students. D. Either seniors or juniors. 参考答案:B 答案解析:[听力原文]19-21 M: Well, Cynthia, (19) our frost semester at university is almost over. I can’t wait