回复：请问：我的REENTRY PERMIT 3月到期，如何申请RENEW?

1.是不是用I-131表再申请一次？

-Yes, you need to come back to US to file I-131 before the current reentry permit expires as you did before.

2.如何填写EXPECTED LENGTH OF TRIP?不确切具体时间的情况下。

-Just write one year plus 11 months.

谢谢。