Question

Not until I dropped off from school ____ how much time I had wasted

1. A.
   didn't I realize
2. B.
   did I realize
3. C.
   I didn't realize
4. D.
   I realized

Answer 1

B
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。