Bonjour,
Réponse :
A: Gill has got a new lipstick it's her lipstick.
her : son rouge à lèvres( possesseur féminin )
B: Jacky and Morris are not happy because Emma has got their camera.
their : leur appareil photo
C: Dad can't write a letter. Where's his pencil case?
his : sa trousse ( possesseur masculin )
D: Give us this camera Emma. It's our camera!
our : notre