-I remember you were a talented pianist at college. Can you play the piano for me?- Sorry

问题补充：

-I remember you were a talented pianist at college. Can you play the piano for me?

- Sorry, I the piano for years.

A. don play

B. wasn playing

C. haven played

D. hadn played

答案：

A. don play

B. wasn playing

(答案→)C. haven played

D. hadn played

解析：首先通过对话，很容易判断出说话者说的是现在情况，因此时间为现在。通过先时后态原则，排除B, D. 再通过for years可判断出是从过去一直到现在的一个持续状态，可由此判断应用现在完成时，答案选C。