根据所给句子,选择最佳的应答语。每个选项只能用一次。 ( )1. What do you do when you meet someone? ( )2. How do you feel when you see the national flag of China? ( )3. I fell off my bike and hurt my arm. ( )4. We should exercise more. ( )5. Do you spend more time with your friends? A. Shake hands. B. Proud. C. No, I didn't. D. Yes, I do. E. Have an X-ray, please. F. Yes, I think so.