What's the fare for a return express ticket to Boston?

去波士顿的快车来回票票价是多少?

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Would you please help me buy an express ticket to Guangzhou?

你帮我买一张去广州的特快车票好 吗 ?

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Buy an express ticket on the train, please.

快车票请在车上购买.

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Give me an express ticket, please.

请给我一张快车票.

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