You must tell Jack about the party-it's a secret

ence)
10. You must tell Jack about the party-it's a secret.
Error:
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11. Joe is the more intelligent boy in the school.
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Error:
12. Do you think teenagers are generally unresponsible ?
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13. There aren't some books about how to control the negative feelings.
Error:
14. We must wear uniform for school activities every month.
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Correction:
Error:
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15. The baby's illness is much bad than we thought at first.
Error:
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16. His uncle decided to take after his wet boots last night.
Error:
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17. Put the flour into a bowl, blend with a few of the milk, then beat in the egg yolks.
Error:
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18. Passengers mustn't to undo their seat belts until the signs have been switched off.
Error:
Correction:
19. Where there is little rain, grass and trees get more thin.
Error:
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20. It would be responsible not to turn up for work without calling.
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III/ Complete each sentence with a suitable phrasal verb given.