请问８老师，皮老师，为父母申请绿卡，真是头疼N／A，NONE 和BLANK的问题。 如I－１３１的INSTRUCTION上要求＂If not applicable or the answer is none, print or type N/A"， 比如PART1用电脑填SSN和A＃，填N／A，自动跳出错误信息说只能是９位数字，那么还需手工填写N／A，还是就空着此处? 又比如PART２，选了１.d,则２.a到２.p都只是＂If you checked box 'i.f.' provide the following information about that person in 2.a.through 2.p." , 这样２.a到２.p应该空着，还是每个都填入N／A. 谢谢了.