1. 是不是还是走VISA通道?还是走绿卡通道?
Visa 通道, unless your I485 is approved, you don't qualify as a permanent resident or citizen at customs.
2.有没有I-94?上面的身份和允许在美国的时间是多少?
For me, when I travelled with AP, they did give me an I94 and the date expiration was AP's expiration date.
3.我现在是H1B,如果回来还是给同一个雇主上班,是不是仍旧是H1B身份?
They stampled AOS on my passport/I94. But I think H1B is still valid until its expiration date.