This is a window.
This is an eraser.
This is a sharpener.
This is a lamp.
These are desks.
This is a bathtub.
This is a notebook.
This is a ruler.
This is a bookcase.
This is a rug.
These are crayons.
This is a backpack.
These are coloring pencils.
This is an armchair.
These are felt tips.
This is a sofa.
This is a book.
This is a mirror.
These are beds.
This is a pen.
These are cupboards.
This is a fridge.
This is a table.
This is a microwave.