网上填写I30的问题

准备在网上填写提交i130， 有三个问题： 第一个，在填写 Your Beneficiary 下面 immigration information 的时候，What was the beneficiary''s class of admission? 还没有申到绿卡，所以填什么？不能不填 第二个，在Beneficiary‘s family 下面current marriage 里有问，When did your beneficiary''s last marriage end? 可是没离过婚怎么填？ 第三个，Other information下面，At which USCIS office will the beneficiary apply for adjustment of status to lawful permanent resident? 我住在GA，是填Dallas Texas吗？父母在国内申请。
谢谢