how to keep green card?

来源: US2UK 于 2004-05-18 23:34:29 [] [旧帖] [给我悄悄话] 阅读数 : (250 bytes)

Folks,

I got a job in London.
How can I keep my green card?
some people say I need to stay
at least 6 months/per year in the US;
someone says that I only need to travel
to the US once a year?

Please advise me... thanks.

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