补充情景对话：
A: I want two return tickets to Suzhou, please.
请买两张去苏州的回程票.
B: That will be 88 yuan.
88元。
A: How long will the journey take?
全程得化多少时间？
B: It takes three hours.
全程得化三小时。
A: Is it necessary to change?
需要换车吗？
B: No. There’s no need to change.
不需要换车。
替换练习：
I want to buy two single-way tickets to Shanghai, please.
我要买二张去上海的单程车票。
three single tickets三张单程车票
two return tickets二张来回车票