Are these headphones your / yours?
yours
This dog is their / theirs.
theirs
This is my / mine dog.
my
This ball is our / ours.
ours
Their / theirs boots are dirty.
their
These are her / hers glasses.
her
Do you like our / ours house?
our
Look at their / theirs bikes!
their
This is our / ours car.
our
This is her / hers bag.
her
Ours / our classroom is nice.
our
These bags are her / hers.
hers
This dog is her / hers.
hers
I like my / mine bike.
my
Is this skateboard him / his?
his
This coffee isn't yours, it's my / mine.
mine
This car is my / mine.
mine
This is their / theirs guitar.
their