What are you doing?
I'm riding a scooter.
What are you doing?
I'm driving a car.
What are you doing?
I'm eating an apple.
What are you doing?
I'm flying a plane.
What are you doing?
I'm driving a bus.
What are you doing?
I’m washing my hands.
What are you doing?
I'm drinking water.
What are you doing?
I'm eating a hamburger.
What are you doing?
I'm sailing a boat.
What are you doing?
I'm cleaning the/a desk.
What are you doing?
I'm flying a kite.
What are you doing?
I'm eating ice cream.
What are you doing?
I'm climbing a tree.
What are you doing?
I'm riding a bus.
What are you doing?
I'm riding a bike.
What are you doing?
I'm driving a train.