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。