1 . What a simple question! Everyone knows the answer, ________ they?(用适当的词填空)
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2 . You forgot to book a room in advance, ______ you? (用适当的词填空)
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3 . You never told me why you were late for the class, _______ ?(反义疑问句)
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4 . _________ (behavior) yourself at school by following the teacher’s instructions and focusing on your schoolwork.
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