Ex 5
You mustn't be late for your job interview.
You must pay the rent on the first day of every month.
You mustn't bring food into the classroom.
You mustn't forget to go to the chemist's after work.
She must phone her mum as soon as she gets home.
He mustn't eat any more sweets or he'll have problems with his teeth.
You must be at the airport by eight o'clock.
You must wear a helmet when you ride a motorbike.
Hurry! We mustn't be late for the party.
You must tidy your room every weekend.
