—It’s a long time since we met last. Haven’t you graduated from college yet?—. I English

问题补充：

—It’s a long time since we met last. Haven’t you graduated from college yet?

—. I English for four years in Nanjing University.

A. No, study

B. Yes, have studied

C. No, am studying

D. Yes, studied

答案：

A. No, study

B. Yes, have studied

C. No, am studying

(答案→)D. Yes, studied

解析：对于否定式疑问句的回答，若是肯定的事实，则用yes，若是否定的事实，则用no，结合语义及选项，可知“我”已毕业，“我”在南京大学学了8年的英语，在“南京大学学英语”为过去的动作。故选D。