| 11. | The settlers had to be on guard against Indian attacks at all times.
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| 12. | Experts say this generation will likely be on guard, less trusting.
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| 13. | Fauria said the Patriots must be on guard for such ineffectiveness.
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| 14. | Health-care workers who suffer accidental needle sticks must be on guard.
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| 15. | What we stress is to be on guard and dodge the sudden attack.
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| 16. | You have to be on guard; they're even in the bathrooms.
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| 17. | When police came to the scene, they were obligated to be on guard.
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| 18. | The media is everywhere and you have to be on guard.
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| 19. | Forecasters also warned people in the Cayman Islands and Cuba to be on guard.
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| 20. | Manning wasn't supposed to be on guard for that play.
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