appeal for reconsideration I290-B

[nsk]

I have filled I290B ,and my case is still pending. My questions are, 1) can i leave US before decision. 2) What document should i need to present at port of entry. 3) i have two more years vaild visa, can i come back after a year.

Thanks

[peace999]

This is a visitor visa section. And your question is too technical. You need to go to a lawyer forum.