Bonjour,
Réponse :
a. When I was younger, I used to work as a fruit vendor.
b. He is going to work in a fast food restaurant next month.
c. I used to be more studious when I was 12.
d. They are going to start working together next year.
e. She used to rake her neighbours' leaves but she stopped.
Explications :
used to ( + base verbale ) : pour parler d'une chose que l'on faisait mais que l'on ne fait plus
Présent avec " be going to" ( + base verbale ) : pour parler d'une intention dans le futur