Is this your book?
No, it's not.
Where is the pencil?
It's on the desk.
Is this your eraser?
No, it's not.
Where's my book?
It's under the chair.
Where's my schoolbag?
It's on the chair.
Is this your pencil?
Yes, it is.
Where's my schoolbag?
It's under the desk.
Where is the book?
It's on the desk.