I 90表格中part 3第7项 since you were granted permanent residence, have you ever filed form I -407, Abandonment by alien of status as lawful permanent resident, or otherwise been judged to have abandoned your status? 选择 y or n. 如何理解。uscisc 查过我身份状况,很明确知道我是填写过407放弃绿卡,后给我的i 90表格。移民官不应该犯如此错误吧。