Réponse :
Bonjour,
1// A young girl is walking with dogs. ( il y a un autre terme pour promener des chiens , mais je ne trouve plus... )
She has been doing this for 2 months.
2// A teenager is delivering tha newspapers.
He's been delivering them since last week.
3// A girl is working in a shop . ( je ne vois pas quel magasin, tu peu préciser )
She's been working there since August.
4// A young girl is working as a waitress in a restaurant.
She's been a waitress for 3 days.
Explications :