问题
选择题
By the time of last year, she the piano for five years. [ ]
A. learnt
B. has learnt
C. had learnt
答案
答案：C
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By the time of last year, she the piano for five years. [ ]
A. learnt
B. has learnt
C. had learnt
答案：C
的名称是“此面禁用手推车”。（）