Whose computer is this?
It's Kim's.
Whose dog is this?
It's Tom's.
Whose kite is this?
It's Tom's.
Whose cat is this?
It's Kim's.
Whose ball is this?
It's Tom's.
Whose book is this?
It's Tom's.
Whose hat is this?
It's Kim's.
Whose watch is this?
It's Kim's.