—How long have you retired, Grandpa?
—Well, four years, But you know, I         for Courtaulds for over forty years.
A．have workedB．workedC．had workedD．Work
B
考查時態(tài)。 根據(jù)four years可知，爺爺已經(jīng)退休四年了。所以我工作了四十年是發(fā)生在過去的事情。
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