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 realize
B、did I realize
C、I didn’t realize

答案B

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:I didn’t realize how much time I had wasted until I began to work.
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