问题
选择题
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
答案
答案：A
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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
答案：A