根据对话内容填空。 Jack: Hi, Frank. Frank:Hi,Jack Jack: 1 Frank:Yes,I have some books to read, but I can do it later. Jack: I want you to do me a favor. Frank: Go ahead, 2 Jack: Professor Smith is coming this afternoon. I am expected to meet him at the airport, but I have an important meeting to go to. Frank: I can do it for you. 3 Jack: He’s about your age, in his early thirties. Tall and handsome. Frank : 4 Jack: Oh, about three o’clock. He is taking flight number 231 from Detroit. Thank you. Frank: 5 A. See you this afternoon. B. How can I recognize him? C. What do you want me to do? D. Are you free this afternoon? E. When should I leave for the airport? F. I am honored to meet the famous professor. G. Are you going to the meeting this afternoon?