Question

Edward, you play so well. But I ________ you played the piano. A. didn’t know   B. hadn’t known

C. don’t know       D. haven’t known

Answer 1

A

解析:

A。根据句意可知，说话者是“过去”不知道，现在已经知道了，因此句子用一般过去时。句意为：爱德华，你弹得太好了。但我之前不知道你会弹钢琴。又如：Hello! I didn’t know you were in London. How long have you been here? 你好! 我之前不知道你在伦敦。你在这里多久了?