My friend got the answer from USCIS website.

A. If you are in the United States as a permanent residentor conditional permanent resident, you may apply for areentry permit.
Departure from the United States before a decision ismade on an application for a reentry permit does notaffect the application.

所有跟帖： 

• 哦！那是燕子搞錯了，對不起！盼您紅兒早點綠呀！！！ -小燕南南飛- ♀ (0 bytes) () 09/13/2007 postreply 15:04:57

• 燕子,好久不見你阿公了,你阿公哪裏去了?綠了嗎? -玉墜兒- ♀ (0 bytes) () 09/13/2007 postreply 17:45:06

• 阿公去了中國了！ -小燕南南飛- ♀ (0 bytes) () 09/13/2007 postreply 18:02:50

• 燕子已經結婚了? -紅繩掛墜兒- ♂ (0 bytes) () 09/13/2007 postreply 19:27:02