Edward you play so well but I you play the piano.A. didn’t knowB. hadn’t knownC. don’t

问题补充：

Edward, you play so well, but I you play the piano.

A. didn’t know

B. hadn’t known

C. don’t know

D. haven’t known

答案：

(答案→)A. didn’t know

B. hadn’t known

C. don’t know

D. haven’t known

解析：考查时态。本题意为我本不知道你会弹钢琴，表示原来不知道，因此用一般过去时即可