问题
选择题
.Not until he left his home________to know how important the family was for him.
A.did he begin B he begins C.he began D.he has began
答案
答案：A
“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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