Bonjour,
Réponse :
a. John/write/ his lesson
John was writing his lesson.
b. Gary and Peter / chat
Gary and Peter were chatting.
C. Mary/ read
Mary was reading.
d. All the pupils / sit
All the pupils were sitting.
e.I/ listen to the teacher
I was listening to the teacher.
Explications :
Pour dire ce que quelqu'un faisait on utilise le prétérit Be + V-ing
was / were + Base verbale-ing