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

A．didn’t realize

B．did I realize

C．I didn'trealize

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参考答案

答案解析

本题考查句子的部分倒装结构。当not…until置于句首时，句子要使用部分倒装，即将谓语的一部分如助动词或情态动词放在主语之前。如果句中的谓语没有助动词或情态动词，则需添加助动词do、does或did，并将其置于主语之前。本句正常语序为tI didn’trealize how much time I had wasted until I beganto work．

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