Помогите срочно!
1) Puplis must/ mustn't obey the teacher.
2) Puplis need/ needn't use the Internet at their IT lessons.
3) Puplis have to/mustn't use someone else's book or gym locker,or allow them to use yours.
4) Mobile phones needn't/ must be turned off during regular school hours.
5)Students needn't/ mustn't have the following items at school: knives,weapons,dangerous objects,tobacco,drugs,alcohol and gang emblems.
6) You have to/ needn't take off your hats and coats when you enter your classroom.