Not until I began to work_____how much time I had wasted.

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问题 Not until I began to work_____how much time I had wasted.

选项 A、didn’t I realize
B、did I realize
C、I didn’t realize
D、I realized

答案B

解析 在具有否定意义的词起始的句子中,主句中的主语和谓语要倒装。倒装时,助动词移至主语前面,实意动词仍在主语之后。
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