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turn off the light
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Listen to your teacher.
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Don't cheat in class.
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Be quiet.
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turn on the light
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listen to me
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sit down
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be quiet
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Don't write in the books.
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clean the board
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open the window
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close the door
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come here
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open your book
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turn around
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stand up
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look at the board
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Raise your hand.
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come in