Not until I dropped off from school ____ how much time I had wastedA.didn't I realizeB.did I realizeC.I didn't realizeD.I realized
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B解析试题分析:考查倒装句。Not until结构放在句首时，主句要用部分倒装语序，故排除C、D选项，因为not已经提至until从句前，后面不能再用否定词，所以B选项正确。句意：直到我辍学后，我才意识到我浪费了多少时间。考点：考查倒装句。