I don't have enough blank

my passport. I almost ran out of my blank pages on my current passport, and I don't want to change a new one.

I asked Chinese consulate in NY, they said they don't add pages to passport (they had this kind of service before). If you ran out of blank pages on your current passport, they will give you a new one.

Since my I-485 is pending now, I don't want to change my passport and make situation complex.

So, if officer doesn't stamp my passport when AP is used, I can still use my current passport eventhough it has no enough blank page.