: 1. I ask a question?
a) May b) Should
2. I go out tonight. I'm too busy.
a) might b) can’t
3. You be rude to your teachers.
a) don't have to b) mustn't
4. You use a mobile phone on a plane.
a) mustn't b) needn't
5. Parents park their cars in front of the school gates.
a) can't b) don't have to
6. He has left the army and doesn’t to wear a uniform any more.
a) can b) need
7. ___ I invite Nick to our house?
a) may b) can
8. You to work hard
a) need b) must
9. You stay at home if you are ill
a) should b) need
10. You___ ask for permission to leave the classroom
a) may b) have to
