(My sister's) favorite animal is tiger.
her
Why are (you and your brother) sad?
you
(Your eyes) are beautiful.
they
Who is (this tall woman)?
she
These are (my parents') car.
their
(That girl and I) are very good friends.
we
(That boy's) dog is very smart.
his
Where is (our uncle)?
he
Is (your pen) blue or red?
it