经典口语：Travel 旅游
Dialgue 1: 1对话1:
Custmer: Hell, I’d like a return t Xi’an please.
Custmer: 你好，我想买去西安的往返票。
Travel Agent: Certainly. When d yu want t travel?
Travel Agent: 好的，你想什么时候走？
Custmer: Tmrrw.
Custmer: 明天。
Travel Agent: Ok, no prblem. What class f service wuld yu like - sft sleeper r hard sleeper?
Travel Agent: 没问题，你要买软卧还是硬卧？
