What is this?
This is a book.
What are those?
Those are books.
What is this?
This is a pencil case.
What are those?
Those are desks and chairs.
What is this?
This is a pen.
What is this?
This is a desk.
What is this?
This is a notebook.
What is this?
This is a chair.
What are these?
These are rulers
What is this?
This is an eraser.
What is this?
This is a pencil.
What is this?
This is a ruler.