These/my
These are my pins.
That/her
That is her DVD player.
That/his
That is his MP3 player.
Those/their
Those are their postcards.
Can you...?
Can you turn off the light?
Can you...?
Can you turn on the light?
These/his
These are his posters.
This/her
This is her camera.
This/your
This is your CD player.
Those/her
Those are her shells.
Those/my
Those are my stickers.
This/my
This is my TV.