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You/we must respect older people
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He should close the tab!
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He should pick up the poop before leaving or he should pick up the poop
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We must wear a helmet (when riding a bike, motorcycle,scooter, etc)
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We must be quiet in the library
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You must drive carefully
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You must wear the seatbelt
Lucky you!!
You got 20 points for your team!!
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He must not be late to work