Not until I began to work how much time I had wasted. A．didn't I realizeB．did I realize C．I didn't realizeD．I realized 题目和参考答案——青夏教育精英家教网—

题目内容

Not until I began to work ________ how much time I had wasted.

A．didn't I realize

B．did I realize

C．I didn't realize

D．I realized

答案：B
解析：

解析：在until引导的时间状语从句中，如果not until同时位于句首时，主句中的主语和谓语必须要倒装，即“助动词 (等) ＋主语＋动词原形＋其他”，故选B。句意为：直到我开始工作我才意识到我浪费了多少时间。

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