补全对话,根据句意补全对话,每空一词。 1. A: ________are you? B: Fine, thank you. 2. A: Thank you very much. B: You’re________. 3. A: _______ _________are you? B: I’m twelve. 4. A: ________ ________. Is this your book? B: Yes, it is. 5. A: How do you do? B: _______ ________ _________ ________?