Henry works as a teacher now but he on a farm for three years.A. has worked B. had work

问题补充：

Henry works as a teacher now, but he on a farm for three years.

A. has worked

B. had worked

C. worked

D. had been working

答案：

A. has worked

B. had worked

(答案→)C. worked

D. had been working

解析：考查时态的运用。句意：Henry现在是一位老师，但他曾在农场工作过三年。