老师，我和我老婆实在过不下去了，我们结婚的时候都是 in good faith，但是后来发现她不诚实，她们家在很多问题的处理上更是极不负责任！结婚后多次重要的事情有意隐瞒，自己身体的事情，财产的事情，给别人作担保书这么大的事情居然都不和我先说一下，背着我就和别人签字。现在我们已经没有了相互信任，婚姻已经走到了尽头。我们于去年初登记结婚，她是公民为我申请的conditional green card. 绿卡明年（2012）6月份到期。
请问，如果我们立即file divorce，我在美国的身份是否合法？ 如合法，合法至何时? 我最早什么时候可以file I-751 based on termination of marriage?
-You can file it when you file divorce application or immediately after divorce to keep your legal status.
获得绿卡批准的概率大概有多少？ 我需要提供什么材料来申请I-751？ 是否必须请律师？费用大概如何？
-You had better find a lawyer to help you and the service fee depends on different lawyers. You may contact several lawyers to compare the costs. Normally about $3000 or little bid more is acceptable. This case is simple and any immigration lawyer can deal with.
