回复：回复：回复：回复：回复：再问8老师，皮老师，这个该如何处理

按照你的分析，无论上面两种可能情况下的哪一种，需要做的都仅仅是带上两本护照，加上口头解释就行了？只不过前一种是在美国领事馆向Visa Officer解释，而后一种是在出入关处向Immigratioon Officer做解释。除此之外，我们不需要做其他进一步的任何动作了（比如，我原先以为的可能被要求或者甚至主动地补材料或者其他相关法律意义上的举措），统统都不需要。Is as simple as this?　
-The principle is that she had better use the valid passport to apply for the immigration visa (visa stamp in valid passport). If she becomes a Canadian before the visa interview, she needs to provide the Canadian passport for the visa stamp (also bring the Chinese passport for identification). If the interview occurs before the citizenship change, she needs to provide the Chinese passport for the visa stamp and if she gets the Canadian citizenship before she enters US, then she can use bring both passports (visa stamp in Chinese passport and Canadian passport is valid).