You can marry who you wish. It USA free country. As to when you can marry that depends on more information.

I lost I-485 but have just 3 cards: Employment &Advance Parole, Security Number, Healthcare? So how can I apply for a new I-131?

You need to see a Board Certified immigration attorney since this make almost no sense.

I’m U.S citizen I got married in my country She is pregnant now How it possible to take my wife here to deliver the baby ?

Unfortunately,there is no way to do that legally or practically in four months.

Can I (employment based LPR) marry and sponsor my spouse for green card after I get divorce from my current spouse?

You should ask your own immigration attorney.

Naturalization.change of status?

That is updated at the interview. Congratulations

Cap exempt H1b (through Non profit employer) to Cap subject portability Questiopn?

You six years started with your first H-1. It does not matter if the Hs are exempt or not.

485 petition withdrawal. Can I apply for i-360?

What you need to do is see a Board Certified immigration lawyer immediately before this gets any worse. I assume ICE is ready to start...

Apply for green card for my mother who has adopted a child recently?

Even if she adopts and waits two years she cannot bring the child. You would have to file for directly as a sibling under FB-4 and wait about...

The employer is required to pay the employer's filing fee, normally $2000 but can be $1250 if they have 25 or fewer employees. Anyone can pay...

Will they grant me citizenship in this case

You are not eligible for naturalization and it is not their job to know that when you file.