Réponse :

Je n'ai pu faire que la question 1, 2 et 3 de l'exercice 4.

1. It's the browns' house. It's the browns'. It's her house. It's her.

2. It's Sarah's Jacket. It's Sarah's. It's his Jacket. It's his.

3. It's my parents' car. It's my parents'. It's her car. It's her.

( je crois que c'est bien les bonnes réponses avec les apostrophes ).

Réponse :

It's the Browns' house. It's the Browns' . It's their house. It's theirs.

It's Sarah's jacket. It's Sarah's. It's her house. It's hers.

It's my parents' cat. It's my parents. It's their cat. It's their.

It's his gf's ring. It's his gf's.

voila je pense que c'est ca :)