The girl isn't at home. She (has gone/has been) to the gym.
has gone
The boys have just come back. They have been/have gone to the gym.
have been
Look, Dennis has bought new clothes. He's been/'s gone to the shops.
has been
Jenny and Fiona look great, don't they. Yes, they've just been/gone on holiday.
have been
Is Mary in her room? No, she has gone/has been to the cinema.
has gone
Where is Mom? She's gone/been to the market.
has gone