检查护照确保护照没有过期。

Check to make sure that your passport has not expired.

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请问您要换多少美元？另外，您带了护照没有？

How much US dollars do you want to change and do you take your passport?

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检查所需文件：提前确保自己的护照没有到期，而且你的行程签证已经办妥。

Check your Paperwork - Ensure that your passport is current and that you have any necessary visas for your trip in advance.

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