问题
选择题
—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
答案
答案：B
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。