谢谢8老师，
485表格中的问题：
Part1,24.what is your current immigration status (if it has changed since your arrival)? 应该填什么？-Your parents' current status such as B2 visitor, etc.
我父母一直是B2没有变更过状态，这里是不是应该空着不填？还是填B2？
131表格有个问题想请教，Part4 information about your proposed travel,1a. purpose of the trip 和1b, the country you intend to visit 需要填写吗？（我是帮父母申请绿卡）
