◎ 题干
Not until I began to work ________ how much time I had wasted.
 [     ]
A. did I realize                  
B. didn't I realize
C. hadn't I realized          
D. had I realized
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Not until I began to work ________ how much time I had wasted. [ ]A. did I realizeB. didn't I realizeC. hadn't I realizedD. had I realized…”主要考查了你对  【一般过去时】【部分倒装】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。