What's that?
That's a t-shirt.
What's that? / What are those?
That's a bathroom.
What are those?
Those are beds.
what's that? / What are those?
Those are socks.
What's that? / What are those?
That's a pencil
what are those?
Those are gloves.
What are those?
Those are hats.
What's that? / What are those?
That's a bedroom.
What is he doing?
He's cooking
What's that?
That's a jacket.
What's she doing?
Having a bath.