提交换身份申请(F1 to F2),接到补充材料的通知,其中要求: submit evidence (such as copies of your last three pay slips) to verify you have been maintaining valid onimmigrant status. 我因怀孕生子,今年1月就不工作了,pay slips已经找不到了,请问还有什么可以作为evidence呢? 多谢了先!!