第21题: [单项选择]{{B}} Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. He is busy all morning. B. He will give a lecture on air-conditioning. C. He cannot bear the low temperature in the auditorium. D. He likes the atmosphere in the auditorium. 参考答案:C 答案解析:[听力原文]
W: That’s an awfully heavy sweater for a day like today. M: Well, I’m going to be at a lectu