What are they doing?
They are catching a train
What is he doing?
He is watching a movie
What are you doing at the mall?
I am going shopping at the mall
What are you doing at the museum?
I'm taking photos at the museum
What are you doing at the park?
I'm meeting friends at the park
What are they doing?
They are going shopping
What is she doing?
She is eating out\having a meal
What are you doing at the restaurant?
I am eating (having a meal) at the restaurant
What are you doing at the cinema?
I'm watching a movie at the cinema
What are we doing?
We are meeting friends
What are you doing?
I'm taking photos
What are you doing at the station?
I'm catching a train at the station