Here are the common questions I used to get when my daughter was an infant. She was brought into our lives through the miracled of open domestic infant adoption. She is now 3 1/2 years old.
How much did she cost?
Both my children are priceless!!!
Where/when did you get her?
From the planet earth when she was born
Do you know or have you met her real mom?
Pinch me, do I feel real enough to you. I AM her real mom. Now if your referring to her biological mom, then yes, I have met and still maintain contact with her.
You are doing such a good thing by adopting your baby. She is so lucky to have you!
This was how our family was meant to be. We are all lucky/grateful to have one another
Now that she's older, I mainly get
Where did she get her blue eyes and blonde hair from?
Her father (I mean her REAL father). Actually, she does get it from her biological father. 
Do you still speak with or have contact with her real
mom?
I am REAL, and yes I do speak to myself quite often. However, if your asking about her biological mother, then yes we still speak.
Quite frankly, these questions used to bug the heck out of me (and I am saying this nicely) But I have since gotten used to gently, yet firmly correcting them.