minimum period vs. at least how long

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jokaec1

Junior Member
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Jun 25, 2015
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Student or Learner
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Chinese
Home Country
Hong Kong
Current Location
United States
1) What is the minimum period I need to stay in US in order to apply for the green card?
2) At least how long do I need to stay in US in order to apply for the green card?
Are these sentences correct? If not, please help to correct them. Thank you!
 
Both are okay, although I prefer #1.
 
1) What is the minimum period I need to stay in the US in order to apply for the green card?
2) [STRIKE]At least[/STRIKE] How long do I need to stay in the US in order to apply for the green card?
Are these sentences correct? If not, please help to correct them. Thank you!
See above.
;-)
 
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