Possessive pronouns

The boys have got a cat. The cat is THEIRS / HIS / OURS.

Ben and I have got new schoolbags. Those blue schoolbags are THEIRS / OURS / YOURS.

We have got blue pens. The red pens are not THEIRS / HERS / OURS.

Ask Harry about the ruler. Maybe it's HIS / YOURS / HERS.

Hi, Dan! This chocolate is HIS / YOURS / HERS. Happy birthday!

Brian and Patrick have got maths textbooks. These maths textbooks are HIS / OURS / THEIRS.

I've got a diary. The pink diary is MINE / THEIRS / HERS.

The green notebook is MINE / THEIRS / HERS. Please give it to me.

Please give the book to Anne. It's THEIRS / HERS / OURS.

Brian has got a dog. The black and white dog is HIS / YOURS / HERS.

My grandmother has got a cat. That cat is THEIRS / HERS / OURS.