题目内容
Not until I dropped off from school ____ how much time I had wasted.
| A．didn't I realize | B．did I realize |
| C．I didn't realize | D．I realized |
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。
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