Her daughter began to play piano when she was five. Now shes very good at it.A. an B. a C

问题补充：

Her daughter began to play piano when she was five. Now shes very good at it.

A. an

B. a

C. the

D. /

答案：

A. an

B. a

(答案→)C. the

D. /

解析：考查冠词的使用。演奏乐器要冠词the 。