语法与词汇
8.
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
【正确答案】
A
【答案解析】
句意：直到离开家他才开始了解家对他来说多么重要。not until置于句首，主句要部分倒装，排除C、D两项；又根据句意得知begin需用过去式，但发生在leave之后，故排除B项。
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