再次请教8老师，关于放弃绿卡申请B2签证

你好8老师，曾经发帖求助 http://bbs.wenxuecity.com/immigration/600315.html

现在填签证申请表希望父母能来美探亲，准备签证面试的时候一起提交I-407。签证申请表有个问题：Are you a permanent resident of a country/region other than your country/region of origin (nationality) indicated above?  这里是填YES还是NO？我是准备填YES。需要先行FILE I-407吗？然后填NO？

谢谢