Question

Not until he left his home ______ to know how important the family was for him.

A．did he begin

B．had he began

C．he began

D．he had begun

 

Answer 1

【答案】

A

【解析】考查倒装句。Not until引导的时间状语从句位于句首，主句中主谓部分倒装。故排除C、D;又因为本句使用过去时，故答案为A。