May I have your ______ and passport, please?请出示您的机票和护照。
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I’d like an ______ seat, please. 我想要靠走道的座位。
How much do I need to pay for the ______ part? 我应该为行李超重部分付多少钱？
Sorry, all ______ items of over 100 ml are forbidden. 抱歉，所有超过100毫升的液体都不允许上飞机。
When is the ______ time? 什么时候登机？
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