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 began
C．he began
D．he had began
答案
答案：A
略
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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 began
答案：A
略