By the way,

來源: 863211 於 2015-06-22 15:00:03 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (143 bytes)
回答: 非常感謝！ 由 *summer* 於 2015-06-22 14:09:16

your mother can abandon the green card and apply for B-2 visa at the same time, or apply for B-2 visa any time after abandoning the green card.

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