Choose the correct modal verb.
1. Pupils use the Internet at their IT lessons. *
need
needn't
2. You take off your hats and coats when you enter the classroom. *
have to
needn't
3. Students listen to the teacher. *
mustn't
must
4. Pupils have the following items at school: knives and tobacco. *
needn't
mustn't
5. Pupils use someone's book or gym locker. *
mustn't
have to