Réponse :
Bonjour,
PASSIF = SUJET + " BE" ( conjugué au temps voulu ) + PARTICIPE PASSÉ
tu dois mettre les verbes au prétérit à la voix passive donc :
-------------> SUJET + WAS/WERE + PARTICIPE PASSÉ
a = He was sold
b = They were whipped.
c. = It was written.
d. = we were hidden.
e = I was nicknamed.