My 485 (employment based) has been pending in NSC since March 2007. I am going to file I-131 before end of July. 许多问题不明，请求帮助， 谢谢！
1。 Where should I file my I-131? NSC or Chicago?
2. On I-131 form, Part 1, #3, Class of Admission, what should I fill in the column?
3. Part7, Do I need to give a explanation why I want to apply AP on a separate sheet?
4. I read the I-131 instruction and summarized a filing list, please advise anything else I should include in the package:
(1) I-131 form
(2) Filing fee, $170
(3) 2 photos
(4) Copy of I-485 receipt
(5) The current H-1B approval notice
(6) Copy of Passport photo page