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1. 请问我现在为我父母两个人担保绿卡申请。我个人收入十万。可否单独担保？
-Yes.

2.可否填864EZ表？（864和864ez 有何区别？）
-Yes. I-864 applies to all of the cases; I864EZ only applies to certain cases.

3.如果可填864EZ, 问题1c：the sponsors immigrant is the only person immigrating based on the underlying visa petition. 我是否填YES？
-Right.
By the way, you need to file two I-864 EZ, respectively, for your father and mother.