Choose the right modal verb

1. There are plenty of tomatoes in the fridge. You mustn't needn't may not should not buy any.
2. It's a hospital. You mustn't needn't may not don't have to smoke.
3. He had been working for more than 11 hours. He must need had better mustn't be tired after such hard work. He may should must had better prefer to get some rest.
4. I could might can must speak Arabic fluently when I was a child and we lived in Morocco. But 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 may can must need just say a few things in the language.
5. The teacher said we can needn't must should read this book for our own pleasure as it is optional. But we could need needn't mustn't read it if we don't want to.
6. May Need Must Can you stand on your head for more than a minute? No, I may not needn't can't .
7. If you want to learn to speak English fluently, you could need needn't mustn't to work hard.
8. Take an umbrella. It need should mustn't might rain later.
9. You shouldn't need needn't may not leave small objects lying around . Such objects must need may mustn't be swallowed by children.
10. People couldn't needn't mustn't may not walk on grass.
11. Drivers could must may stop when the traffic lights are red.
12. May Must Should Will I ask a question? Yes, of course.
13. You couldn't needn't mustn't may not  take your umbrella. It is not raining.
14. Can Need Should May you speak Italian? No, I shouldn't mustn't may not can't .