Not until he left his home _____ to know how important the family was for him
A.did he begin
B.had he begun
C.that he began
D.he had begun
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A解析试题分析:考查倒装句。Not until +从句位于句首时从句需用部分倒装语序，即一般疑问句语序。所以排除C、D选项，而根据时间状语从句until he left his home 可以判断主句应该用一般过去时，故A选项正确。句意：直到离开家他才开始知道家庭对他来说是多么的重要。考点：考查倒装句。