Whose diary is that? That/my sister/diary
That is my sister's diary.
Whose that? That/ my friend/ mum
That is my friend's mum.
Whose headphones are these? These/Lola/headphones
These are Lola's headphones.
Whose books are those? Those/my friends / books
Those are my friends' books.
Andy/ hoodie/ green
Andy's hoodie is green.
Whose trainers are these? These/ my brother/ trainers
These are my brother's trainers.
Sam / skateboard/ new
Sam's skateboard is new.