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．had he begun
C．he began
D．he had begun
答案
答案：A
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。