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    11．. The school rules state that no child shall be allowed out of the school during the day, accompanied by an adult. A. once B. when C. if D. unless 【查看更多】

     

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    ．（山东卷28）. The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

      A. once           B. when         C. if             D. unless

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