但我老婆原来来美国时用的中国付照。现在她要用加拿大付照入境美国。我想移民局会问为什么付照不一样了喃. 我们怎么办喃?。
-Just tell the truth that the citizenship has been changed. As long as the CBP officer can verify the green card owner is your wife, your wife will be allowed to enter US no matter what passport she has (the CBP officer also can tell whether her passport is true or not).