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
网友回答
B解析这是一个倒装句型。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等。这里not until是否定副词,因此选B。