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.