Réponse:
a. if i had seen the series,i would have known what they had been talking about.
b. if i were a fan of The Crown,i would watch it.
c. if the director had asked her to come and meet the actors,she wouldn't have written to him.
d. if i were not busy today, i would work on the progect.
e. if i were sure that i am free tomorrow,i would come with you.