2. 外语
  3. Not until ______ himself seriously, iii.

Not until ______ himself seriously, iii.

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问题 Not until ______ himself seriously, iii.
选项 A、he had completed the task did he find
B、had he completed the task did he find
C、he completed the task had he found
D、did he complete the task he had found
答案A
解析 句子结构题。本题主要考查not until…的倒装用法。not until置于句首，从句语序不变，主句需部分倒装(将助动词提前)。若主句用一般过去时，从句一般用过去完成时。A 为答案。
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