Do you have anything to declare?有什么需要报关的吗

1.May I see your passport, please? 请出示您的护照。2.How long will you be staying in the United States? 您在美国停留多长时间？3.What's the purpose of your visit?您来旅行的目的？4.I'd like to reconfirm my flight. 我想确认一下我的机票。