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