choisir l’un d’eux
She is about to choose one of them.
Elle est sur le point d'en choisir un.
You may choose one of them.
Vous pouvez en choisir un.
You have to choose one of them!
Vous devez en choisir un !
You can choose one of them.
Choose one of them.
Choisissez-en un.
— Howl's Moving Castle (2004)
I will choose one of them.
J'en choisirai un.