This/these; that/those. Possessive pronouns

Look at ________ children. They are so happy!

I like _____ headphones. I take them everywhere.

__________ my favorite book. It's really funny.

________ your beanbag?

______ are my T-shirts. They're old, but I like them.

I am a teacher. _____ school is new

This is Mary and that is ___ book.

We are friends. And that is _____ treehouse.

That is a cat and that is ____ tail.

You are a girl and that is _________ pink bike.