补全对话。 J-Jim  D---David J: Hi, David. How are you? D: 1_____ J: What are you going to do next weekend, David? D: 2_____  How about you? J: I don't know, either. D: 3_____ J: Good idea! But where shall we skate? D: The lake near our school is icy (结冰的) now. Let's skate there. J: All right. 4_____ D: Let's meet at the school gate. J: 5_____ D: Let's meet at nine o'clock. J: Great. See you next Saturday. D: See you. A. Where shall we meet? B. Fine, thank you. C. What time shall we meet? D. How about skating on Saturday? E. I have no idea.