根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。并在答题卡上将该项涂黑。选项中有两项为多余选项。
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?