问题补充:
Not until I to work how much time I had wasted.
A. did begin; didn’t I realize
B. began; I realized
C. did begin; I realized
D. began; did I realize
答案:
A. did begin; didn’t I realize
B. began; I realized
C. did begin; I realized
(答案→)D. began; did I realize
解析:本题考查倒装句。否定词Not until位于句首,主语要用部分倒装,但从句不倒装。句意:直到我开始工作我才意识到我浪费了多少工作。根据语境应用过去式,所以选D