Bonjour,
Réponse :
Choisis la forme verbale qui convient.
a. Did you watch / Were you watching the football match when John arrived / was arriving?
→ Were you watching the football match when John arrived?
b. We had / were having dinner when you called / were calling me.
→ We were having dinner when you called me.
c. Did you sleep / Were you sleeping when I arrived / was arriving?
→ Were you sleeping when I arrived?
d. We met / were meeting his brother while we waited / were waiting in the queue.
→ We met his brother while we were waiting in the queue.
Explications :
prétérit be + BV-ing : pour les actions "longues", qui étaient en train de se dérouler
prétérit simple: pour les actions "courtes" qui ont interrompu les actions en cours