What's this?
This is a pencil.
What are these?
These are books.
What's this?
This is a book.
What's this?
This is a pen.
What's this?
This is a ruler.
What are these?
These are pens.
What are these?
These are rubbers.
What are these?
These are rulers.
What are these?
These are bags.
What's this?
This is a bag.
What's this?
This is a door.
What are these?
These are doors.
What's this?
This is a window.
What are these?
These are windows.
What's this?
This is a folder.
What are these?
These are folders.
