2. 外语
  3. Not until I began to work did I realize how much time I______.

Not until I began to work did I realize how much time I______.

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问题 Not until I began to work did I realize how much time I______.
选项 A、wasted
B、have wasted
C、had wasted
D、was wasted
答案C
解析 本题考查时态。句意：直到我开始工作，我才意识到我以前浪费了多少时间。根据句意可知，waste time发生在began to work之前，应该用过去完成时。故本题选C。
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