◎ 题干
Not until he left his home _______to know how important the family was for him.   
  [     ]
A. did he begin        
B. had he begun      
C. he began      
D. he had begun
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Not until he left his home _______to know how important the family was for him. [ ]A. did he beginB. had he begunC. he began D. he had begun…”主要考查了你对  【一般过去时】【部分倒装】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。