They don't have fun---------the piano.\A.playing B.play C.to play D.for playing

They don't have fun---------the piano.\A.playing B.play C.to play D.for playing
They don't have fun---------the piano.\A.playing B.play C.to play D.for playing

They don't have fun---------the piano.\A.playing B.play C.to play D.for playing
选A playing
They don't have fun playing the piano.
他们弹钢琴弹得不开心.
have fun doing sth 做某事开心
not have fun doing sth 做某事不开心

答案：They don't have fun【playing】the piano.

翻译：他们弹钢琴弹的不快乐.

解析；have fun doing sth.翻译为做某事感觉很快乐.

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【你的十分满意，我们团队的无限动力】

A.playing
have fun doing sth