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10. I _____ go now, or I'll miss my bus.
a) can
b) must
c) need
d) ought

11. I tried my best, but I _____ the test.
a) was unable do
b) couldn't do
c) couldn't have done
d) oughtn’t to do

12. There is no one today to help you; so you _____ do the job by yourself.
a) will have to
b) will be able
c) ought
d) must to

13. _____ I help you?
a) Can
b) Must
c) Should

14. If you travel to Moravia you _____ have a visa.
a) can
b) must
c) should

15. You _____ laugh at old people.
a) couldn't
b) don't have to
c) shouldn't

16. Passengers _____ not smoke in the toilets.
a) can
b) must
c) should

17. I think you _____ eat less and take more exercise.
a) can
b) must
c) should

18. You _____ drive on the left in Britain.
a) have to
b) may

19. She has new clothes every week. She _____ have plenty of money.
a) can
b) must
c) should