同時請教, 如果要保持綠卡,必須3個月或半年回美國一次嗎?

來源: winrainbow 於 2008-04-20 11:28:55 [舊帖] [給我悄悄話] 本文已被閱讀：次

有沒有別的方法保持綠卡?謝謝.

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