—Your English is good.—Thank you. I it for three years.A. learnB. learnedC. have learnedD

问题补充：

—Your English is good.

—Thank you. I it for three years.

A. learn

B. learned

C. have learned

D. had learned

答案：

A. learn

B. learned

(答案→)C. have learned

D. had learned

解析：考查动词的时态用法。根据句中的“for three years”可知，学英语三年了，用现在完成时；此句中不涉及过去的时间，排除一般过去时和过去完成时。