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    Not until the teacher reported it to the headmaster how serious the problem was. A. did the student realize B. the student realized C. the student did realize D. didn’t the student realize 【查看更多】

     

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     Not until the teacher reported it to the headmaster _____ how serious the problem was.
     A. did the student realize     B. the student realized 
    C. the student did realize      D. didn’t the student realize

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