——Is this your ruler?  ——No, it’s       

--- Who will send you to the new school, your mom or your dad? --- _______. I’ll go there on a bus by myself.

I found a story-book on the desk, it isn’t mine, it is ___,I think.

--- Excuse me, is this ______ ipad?--- No, it’s not mine. It’s my friend’s.

We don’t know _________. She is new here.