What are they doing?
They're / are walking.
What are they doing?
They're/ are studying.
What's he doing?
He's/ is cooking.
What are they doing?
They're / are drawing.
What are they doing?
They're/ are swimming.
What's he doing?
He's/ is talking on the phone.
What's he doing?
He's / is running.
What's he doing?
He's /is sleeping.
What's she doing?
She's /is singing.
What's she doing?
She's/ is dancing
What's she doing?
She's/ is reading.
What's she doing?
She's/ is washing her face.
What's she doing?
She's/ is watching TV.
What are they doing?
They're/ are eating dinner.
What's she doing?
She's/ is brushing her teeth.
What's he doing?
He's/ is taking a shower.