1. My dentist said that!...........neglect brushing my teeth.
2. There is another bus later, so we..........to get on this one.
3. You.........to leave any medicine where children can reach them.
4. This is a non-smoking area, so you.......to smoke here.
5. The entrance is free of charge, so you.........to buy a ticket
6. You............... to sleep late today, you need to wake up early in the
morning
7. This is our gift to you. You........ to give it back to us.
8. The sign said that one.......to eat in the library
9. It's Friday today. I........... to do any homework
10. Judy.......... stay home. She has a headache
11. Whatever you do, you......... touch that switch. It's very dangerous
12. I don't want anyone to know you.............tell anyone
13. He............. wear a suit to work but he usually does.
14. I can stay in bed tomorrow morning because i.........go to work
15. There's a lift in the building, so she.......... climb the stairs
16. You .................forget what I told you. It's very important.
17. Sue.........get up early. She gets up early because she wants to
18. Don't make so much noise. We............ wake the baby.
19.I.........eat too much. I'm supposed to be on a diet
20. You............. be a good player to enjoy a game of tennis​
mustn't,don't have to or should 
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CẢM ƠN!!!!!!!!