Bonjour est ce que quelqu’un pourrais m’aider pour cette exercice que je ne comprend pas merci

Bonjour !

a. Yesterday, fifty candidates were auditioned for one role !

b. Every day, Kitty is given healthy cat food by the children.

c. Last week, the students were asked to read more books by their teacher.

d. Last night, the band was applauded for a long time by the audience.

J'espère t'avoir aidé. Bon courage !