It's - They're
It's a bag.
What are these?
They're crayons.
What is this?
It's a bookcase.
What are these?
They're books.
What are these?
They're doors.
What is this?
It's pen.
What is this?
It's a rubber.
What are these?
They're rulers.
What is this?
It's a pencil.
What are these?
They're windows.
