听句子,选择正确的答语。 ( ) 1. A. Good night. ( ) 2. A. It's nice. ( ) 3. A. The train leaves at 11: 15. ( ) 4. A. Sure. ( ) 5. A. Yes, I am. B. Good morning. B. Here is the key. B. One pair. B. All done. B. No, I can. C. Good afternoon. C. By plane. C. Forty yuan. C. It's nice. C. Yes, I can.