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Fill in ought to, should, must, mustn't, shall, can, can't, needn't, or didn't need to.
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1. He ___ be more careful. 2. That ___ be Sam's book. 3. He ___ be her brother.He is too old. 4. You ___ play in their garden. 5. They ___ repair the car two days ago.6. You ___ eat so much. 7. ___ I open the window? 8. She ___ be the woman who spoke to me.9. We ___ go shopping with our parents today. 10. ___ she really be 40 years old?11. He ___ study harder. 12. You ___ leave the camp on your own. 13. You ___ take a cassette player or walk-man when you go to the camp. 14. You ___ wait for them. 15. ___ I post this letter for you?

1. He ought to be more careful. 2. That must be Sam's book. 3. He can't be her brother.He is too old. 4. You mustn't play in their garden. 5. They didn't need to repair the car two days ago.6. You mustn't eat so much. 7. shall I open the window? 8. She must be the woman who spoke to me.9. We can't go shopping with our parents today. 10. can she really be 40 years old?11. He should study harder. 12. You mustn't leave the camp on your own. 13. You can take a cassette player or walk-man when you go to the camp. 14. You needn't wait for them. 15. shall I post this letter for you?