12. Can you place your bags on the conveyor belt? 请把你的行李放在传送带上。13. Have you packed your bags yourself? 你自己打包的行李吗？14. What is the weight limit for checked baggage? 托运行李的限重是多少？15. Can I have a refund for my unused ticket? 我可以要求退票吗？16. How ...