—How long have you retired, Grandpa?
—Well, four years, But you know, I for Courtaulds for over forty years.
A. have worked
B. worked
C. had worked
D. Work
网友回答
A. have worked
(答案→)B. worked
C. had worked
D. Work
解析：考查时态。 根据four years可知，爷爷已经退休四年了。所以我工作了四十年是发生在过去的事情。