问题
选择题
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
答案：D
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