第21题: [单项选择]Questions 11-13 are based on the following dialogue.When did the two people see each other last time A. A long time ago. B. Last Monday. C. Last Wednesday. D. Last Christmas. 参考答案:D 答案解析:[听力原文]11-13 W: Well, Jerry, what a surprise! It’s nice to see you again. M: Hello, Grace! My g