根据下面对话的意思，选择合适的选项补全对话，将序号写在横线上。

Jack: Hello!

Hans: Hello. This is Hans. May I speak to Jack, please?

Jack: 1___________.

Hans: Hi, Jack. How are you?

Jack: Fine, thanks. How are you?

Hans: I'm fine. Thank you. Jack, 2___________

Jack: Sure. 3___________.

Hans: There is something wrong with my computer. Can you repair it?

Jack: Certainly, but not today. 4___________.

Hans: OK. Thanks a lot. 5___________.

A. See you then.

B. What is it?

C. How about Sunday afternoon?

D. Can you help me?

E. Speaking.