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公民麵試已經通過，22日去宣誓入籍，可一個月以前就定好24日去墨西哥度假一周，我現在是加拿大公民，持加拿大護照，回美時可以用加國護照和美國的公民紙入境嗎？

-After you take the oath, you are a US citizen. Thus, you need to have your US passport to travel outside US, and can not use the Canadian passport to enter US.

還是需要reschedule宣誓日期？

-Yes, you can. Read this website:

http://www.immihelp.com/citizenship/naturalization-oath-ceremony.html

萬分感謝！