Whose dog is it? (Sack)
It is Sack's dog.
Whose phone is it? (Mark)
It is Mark's phone.
Whose trousers are they? (Nick)
They are Nick's trausers.
Whose toys are they? (boys)
They are the boys' toys.
Whose bag is it? (Lilly)
It is Lilly's bag.
Whose turtle is it? (Nina)
It is Nina's turtle.
Whose book is it? (Anne)
It is Anne's book.
Whose eggs are they? (chickens)
They are the chickens' eggs.
Whose garden is it? (girls)
It is the girls' garden.
Whose skirts are they? (girls)
They are the girls' skirt.
Whose cat is it? (Sarah)
It is Sarah's cat.
Whose bikes are they? (boys)
They are the boys' bikes.
Whose glasses are they? (Ellie)
They are Ellie's glasses.
Whose computer is it? (Ben)
It is Ben's computer.