重新排列以下句子的順序,使它們組成一段通順的對話。 A. Oh, yes, it is. It's in the book. Thank you. B. No, it isn't. C. That's all right. D. Excuse me, where's my ruler? Do you know? E. No, I can't see it. F. Is it in your math book? G. Oh, sorry, I don't know. Is it in your pencil case? H. Is it in your desk? 1. 2. 3. 4. 5. 6. 7.8.