Question

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

Answer 1

A

解析这题考查倒装句的用法，Not until在句首时，主句要部分倒装。要注意的是：not until引导的时间状语从句不用倒装。句意是：直到他离开家，他才知道家庭对他有多重要。选A。