What's this?
It's a pen.
What's this?
It's a ruler.
What's this?
It's a notebook.
What's this?
It's a bag.
What's this?
It's a desk.
What's this?
It's a book.
What's this?
It's a rubber.
What's this?
It's a pencil-case.
What's this?
It's a pencil.
