第28题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. The man’s test. B. The woman’s research paper. C. Go swimming over at the student center. D. Plans for the evening. 参考答案:D 答案解析:[听力原文]19-22 M: Let’s go swimming over at the student center. W: I’d like to, but I have a pape