保持綠卡有效?

來源: Floatinger 於 2004-04-19 23:35:08 [舊帖] [給我悄悄話] 本文已被閱讀：次

請問怎樣保持綠卡有效,EB1 CLASS, 想回國發展, 有一年必須在美國呆夠6月一說?
多謝!

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