Réponse :
1 Whose dog is it? It is Mary's dog.
2 tu fais la même chose : whose muffin is it ? It is Noah's muffin.
3 Whose socks are they ? They are Sam's socks.
4 Whose schoolbag is it ? It is Angie's schoolbag.
Explications :
C'est l'appartenance : à qui appartient etc... ! J'espère que tu as compris