Bonjour,
Réponse :
1. Look at this girl! I read about her in the local newspaper.
This is the girl whom I read about in the local newspaper.
whom : antécédent humain qui est complément
2. I lived in a flat. The flat was on the top floor.
I lived in a flat which was on the top floor.
which : antécédent non humain ( a flat )
3. I know this boy. His locker was destroyed.
This is the boy whose locker was destroyed.
whose : lien d’appartenance
4. There is a new store in town. It sells graduation gowns and tuxedos.
There is a new store in town that sells graduation gowns and tuxedos.