I wonder how many years ago .
A. did your father retire
B. has your father retired
C. your father retired
D. your father has retired
网友回答
A. did your father retire
B. has your father retired
(答案→)C. your father retired
D. your father has retired
解析：考查宾语从句。根据从句时间状语how many years ago可知从句叙述的过去的动作，故用过去时态，宾语从句一般用陈述语序，故选C。