Answer the question. Are the rulers yours?
Yes, they're mine.
Answer the question. Whose cat is this?
It's theirs.
Answer the question. Is the pencil yours?
Yes, it's mine.
Answer the question. Is the doll yours?
No, it isn't mine.
Answer the question. Whose books are these?
They're his.
Answer the question. Are the dogs yours?
No, they aren't mine.
Look at the picture. Make a question by using "Whose...?"
Whose earrings are these?
Answer the question. Whose mirror is this?
It's mine.
Answer the question. Whose sweets are these?
They're hers.
Look at the picture. Make a question by using "Whose...?"
Whose backpack is this?