1. "Hey, you're Eric Dunn, the new kid. Your bike is really cool, Eric.

2. Look, it's uncle John. He's really cool. That's his bike.

3. That's Ms. Washington. She's a volleyball coach. Those are her volleyballs.

4. They're Tina and Sam Barnes. This is their dog Biscuit

Explicação:

Para fazer, usei o possessive pronoms. Que se dá da seguinte forma:

I - My

You - your

He - his

She - her

it - its

You - your

We - our

They - their

Coloquei as palavras que você deve colocar nas lacunas em negrito.