Bonjour :)

Réponse en explication étape par étape :

- Question : Complete their conversation :

Teacher : " Tom, can you repeat what I (say) said ? ".

Tom : " Sorry, Miss, I (not/hear) didn't hear you ".

Teacher : " Of course, you (not/listen) weren't listening ! What (you/do) were you doing ? ".

Tom : " Nothing Miss ".

Teacher : " You (play) were playing with your mobile. You know mobiles are prohibited in class, don't you ? ".

Voilà