—Have you been teaching here since graduation? —No I on a farm for five yearsA. had wor

问题补充：

—Have you been teaching here since graduation?

—No, I on a farm for five years．

A. had worked

B. have worked

C. was working

D. worked

答案：

A. had worked

B. have worked

C. was working

(答案→)D. worked

解析：考查时态，根据句意：--自从毕业你一直教书吗？--没有，我在农场工作了5年，可知在农场工作是过去的5年，现在在教书，用过去时。选D。