题目内容：

Not until I began to work ________ how much time I had wasted.
A.didn't I realize B.did I realize C.I didn't realize D.I realize

优质解答

答案B 这是一个倒装句型.带有否定意义的词或短语放在句首,语序需要部分倒装.常见的词语有not,never,seldom,scarcely,barely,little,at no time,not only,not once,under,no condition,hardly…when,no sooner…than...