What is she doing?
She's playing basketball.
What are they doing?
They are playing tennis.
What are they doing?
They're playing football.
What's he doing?
He's swimming.
What's she doing?
She's reading a book.
What are they doing?
They are playing the piano.
What's she doing?
She's watching TV.
What's he doing?
He's riding a bike.
What's he doing?
He's playing the piano.