Whose bag is this?
It's his bag.
Whose book is this? It's ____ book.
his
Whose bag is this? It's ____ bag.
his
Whose bag is this?
It's her bag.
Whose bag is this?
It's her bag.
Whose desk is this? It's ____ desk.
her
Whose classroom is this? It's _____ classroom.
their
Whose book is this?
It's his book.
Whose pencil is this? It's ____ pencil.
her
Whose coat is this?
It's her coat.
Whose classroom is this?
It's their classroom/
Whose notebook is this? It's ____ notebook.
her
Whose pen is this?
It's his pen.