My former English teacher who in our school for over 20 years now lives in his hometown

问题补充：

My former English teacher, who in our school for over 20 years, now lives in his

hometown in Yangzhou.

A. has worked

B. worked

C. had worked

D. works

答案：

A. has worked

(答案→)B. worked

C. had worked

D. works

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