C. Complète avec "been" ou "gone"
1) My sister's very lucky. She's...................to London three times.
2) The kids have.................to a party, they'll be back at eight.
3) "Can I speak to Amy, please" ? "Well, she's ..............shopping with her mother".
4) I've never................. abroad, I'd love to go!
5) Sorry, the boss has just...............out to lunch.
6) He's ............... in his room since 6 o'clock.