 Whose pen is this?
 Whose is that bag?
 Whose students are these boys?
 Whose desk is that?
 Whose are these stamps?
 Whose notebook is that?  It's his.
 Whose is that cute cat?  It's ours.
 Whose room is this?  It's yours.
 Whose books are those?  They are theirs.
 Whose computer is this?  It's theirs.
