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If you have questions,you should ask the teacher _________help.
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from
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on
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for
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to
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I often go to school            my friends.
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The moonlight goes _____ the window and makes the room bright.
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across
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Our English teacher is friendly _______us.
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for
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The young man are walking        the park.
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across
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Mr Green has lived in China _______ two years ago.
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before
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