je ne sait pas quesqu'il faut mettre et c'est pour demain

a/impossibilité - obligation
b/ possibilité  - possibilité - impossibilité
c/ impossibilité -obligation-impossibilité

exercice 3      He couldn't play - he coulldn't  talk to hisfriend - he had to go

his father coulldn't - his mother couldn't  - they could-  they couldn't find- Alan had to do his homework