Fill in the blanks with appropriate modals:
1. you (may/ can) buy some apples as there aren’t any
in my house.

2. it's a hospital. you not (should/ must) smoke.

3. he had been working for more than 11 hours. he ( must,
may) be tired after such hard work.

4. i (can/could) speak french fluently when i was a
child and we lived in morocco. after we moved back to canada, i had
very little exposure to the language and forgot almost everything i knew
as a child. now, i (can/ could) only say a few things in the
language.

5. the teacher said we (should/ can) complete our projects
tomorrow.

6. (can/ could) you stand on your head for more than a
minute? no, i (should not/ cannot) .

7. if you want to learn to speak english fluently, you
(must/ should ) work hard.

8. take an umbrella. it (can/ may) rain later.

9. you (should/ may ) not leave small objects lying
around .

10.people (might/ must) not walk on grass.

11. drivers (must/ can) stop when the traffic lights
are red.

12. (should/ may )i ask you a question?

13. they (may/ can ) be on a holiday, but i am not
sure.

14. you (can/ could) be right, but i'd still like to check.

15. (could/ can ) you turn it down a bit ?

16. it's ok- you ( may/ might) go when you've finished.

17. i (ought / must ) to get a public service medal as i
have contributed in building of the orphanage.

18. aynur (can/ should) drink milk every day. she is very
thin.

19. students / should) leave the classroom before
the bell rings.

20. (could/ may) you pass my pencil to me?