: 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