根据对话内容，用方框内所给的句子补全对话，其中有两多余的。 A. I cleaned it last week.                                      B. Can you help me? C. Sure, you can.                                                D. I need to buy some drinks and snacks. E. OK, but I need to do my homework first.          F. OK. I'll do it at once. G. Could you give me some money? A: Could I invite my friends to my birthday party on Saturday, Mum? B: 1.____________________ A: 2.____________________ B: What for? A: 3.____________________ B: Well, I am shopping tomorrow. And I can buy drinks and snacks for you. A: Oh, good. Thank you, Mum. B: Tom. could you clean your room? A: 4.____________________ B: You need to clean it again for your party. A: 5.____________________ B: Then after you finish your homework, let's clean the room.