根据所给图示完成对话。 A: What are you doing? B: I'm 1 my plane. Thereis something wrong 2 it. Could you help me 3 it? A: I'm 4 . I can't help you. I'm very busy now. B: That's all right. Well,do you 5 a knife? Mine is at home. A: Yes, I 6 one. B: May I 7 it? A: Certainly. 8 . Please give it back soon. B: I think I can give it 9 to you this afternoon A: This afternoon? I'm not at school. B: What 10 tomorrow? A: That's OK. 1.______ 2.______ 3.______ 4.______ 5.______ 6.______ 7.______ 8.______ 9.______ 10.______