I－131 表有一个Note：
If you are in the United States and wish to travel abroad, you do not need to apply for advance parol if both conditions described below in number 1 and 2 are met:
1. You are in one of the following nonimmigrant categories:
a. An H-1, temporary worker, or H-4, spouse or child of an H-1; or
b....
2. A form I-485, Application to register Permanebt Residence or Adjust Status, was filed on your behalf and is pending with the USCIS.
However, upon returning to the United States, you must present your valid H, L, K or V nonimmigrant visa and continue to remain eligible for that status.
仔细读了131的说明，好像是专门给绿卡持有人打算在美国以外呆一年以上时用的。
哪位大侠给大家一个解释，看同胞们能否省几百刀。
多谢