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What is he doing?
He is playing the piano.
What is she doing?
She is singing.
What are they doing?
They are singing and dancing.
riding
reading
swimming
drawing
singing
eating
riding a horse
dancing
flying a kite
playing the piano
playing football
playing basketball
the Great Wall
I am visiting the Great Wall
I'm visiting the Great Wall
I am = I'm
We are
riding a horse.
We 're riding a horse.
What is she doing?
She in the sea.
is swimming
She's swimming in the sea.
She is = She's