1. 如果在美国境外申请绿卡过程中， 想改成境内申请绿卡， 同时能否file 485, 需不需要cancel 824 申请过程?
-Not have to.
824 form 批准前后， file 485有区别吗？
-No. If NVC contact you for the processing for immigrant visa applicaiton, just repsond to NVC that you will fine I-485 within US, and ask NVC to stop processing your case there.
2.如果在境外申请绿卡过程中， pending. 还能申请h-1b 入境吗？
-Yes.
h-1b 容不容易批准？与824批准前后有区别吗？
-Not different.
3. 在境外申请绿卡过程中， 可以往返加拿大和美国吗？比如短暂探亲
-Case by case, normally it is OK as long as you convince the IO you will returnt to Canada after short visit.
4. 加拿大公民可以申请b2 签证吗？是在美境内or 加拿大境外申请？ 据我所知， 加拿大公民可以凭护照出入美加边境
-Just use the passport to enter US, no visa is required.
谢谢
