Complete the sentences with a word from the list. Some of the sentences have more than one correct answer.

MUST - MUSTN'T - SHOULD - SHOULDN'T - HAVE TO - DON'T HAVE TO - MAY - MIGHT

1. If you feel tired you____  go to bed early.

2. You ____ pay extra if your luggage is more than 20 kilos.

3. If you want to go climbing you____  buy some boots.

4. 'Do you think Simon will come?' 'Who knows? He____  do'.

5. You _____ worry about me. I'm alright.

6. You ______ pay to join the college sports club. It's free.

7. All UK travellers to Brazil ______ have a visa.

8. You _____ go surfing if you don't know how to swim.

9. 'You______  start writing now' said the teacher.

10. If you have a heart problem you ______ smoke.