Aidez moi silvouplais :)

Bonjour,

Réponse :

a) When they arrived, white people wiped out buffaloes and Indians were

massacred.

=> Action passées : prétérit

b) Today, everyday problems are discussed in ceremonies.

=> "Today" : présent

c) In the past, white people conquered new territories and Indians were

forced to live on reservations.

=> "In the past " : prétérit

Explications :

Passive voice : le sujet subit l’action

  ==> "be" ( au temps voulu ) + participe passé

Active voice : le sujet fait l'action