2. 专升本
  3. Not until the mid-12th century ______as a nation with its own culture and language.

Not until the mid-12th century ______as a nation with its own culture and language.

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问题 Not until the mid-12th century ______as a nation with its own culture and language.
选项 A、Portugal emerged
B、Portugal had emerged
C、did Portugal emerge
D、had Portugal emerged
答案C
解析 分析句子结构可知，not until属于否定副词，位于句首时，句子要部分倒装。根据句意可知，此处用一般过去时，所以助动词应用did。故选C。
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