What's cat doing?
Cat is sitting on a chair
What's she doing?
She is drawing a picture.
What's he doing?
He is eating chicken.
What's cat doing?
Cat is taking (having) a bath
What's he doing?
He is reading a book
What's she doing?
She is drawing a picture
What's he doing?
He is driving a car
What are they doing?
They are listening to music
What's he doing?
He is playing tennis
What's she doing?
She is listening to music
What's he doing?
He is opening a door
What's he doing?
He is playing tennis
What is cat doing?
Cat is playing the piano
What's he doing?
He is flying a plane (and taking a photo)
What are they doing?
They are playing a game
What's cat doing?
Cat is listening to music
What are they doing?
They are watching TV