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?
