Joe likes playing football while his sister enjoys playing piano.A. the; theB. 不填; theC

问题补充：

Joe likes playing football, while his sister enjoys playing piano.

A. the; the

B. 不填; the

C. the; 不填

D. a; a

答案：

A. the; the

(答案→)B. 不填; the

C. the; 不填

D. a; a

解析：考查冠词。英语中球类名词前不加冠词，而乐器类名词前需要加定冠词the。句意：Joe喜欢踢足球，而他姐姐喜欢弹钢琴。