.Not until he left his hometo know how important the family was for him. A.did he begin B

问题补充：

.Not until he left his hometo know how important the family was for him.

A.did he begin B he begins C.he began D.he has began

答案：

解析：“直到离开家他才知道家对于他是多么重要。”否定意义的副词放于句首句子用部分倒装，答案A。

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