1. in our school we CAN have [permission] a mobile phone but we MUST NOT [interdiction] use it in class.
2. At breaks we CAN call [permission] our friends and we HAVE TO wait [obligation] at the phone box.
3. je ne comprends pas le sens de cette phrase, il pourrait y avoir plusieurs réponses en fonction du sens :)
4. Normally, motorists MUST NOT phone [interdiction] when driving; they HAVE TO stop [obligation] because they COULD cause [possibility] accidents.
5. You CAN use [permission] it in a restaurant but you HAVE TO be [obligation] discreet.
