If you drive a bike, you _______ be careful.
mustn't
must
You______________ respect your classmates.
mustn't
must
You _______ do your homework.
must
mustn't
You ________ listen to the teacher.
must
mustn't
You_________ study for exams.
must
mustn't
You_________brush your teeth everyday after lunch.
must
mustn't
You _________ come to class on time.
mustn't
must
You __________ wear shoes when you play football.
mustn't
must
You ________ run in class.
must
mustn't
You__________say "thank you", "please".
mustn't
must
You__________________ break things.
mustn't
must
You________ throw rubbish on the floor.
must
mustn't
You________be a good person.
must
mustn't
You ________ shout in class.
must
mustn't
You _________ eat a lot of hamburgers, if you want good health.
must
mustn't