They don't have fun---------the piano.\A.playing B.play C.to play D.for playing
问题描述：
They don't have fun---------the piano.\A.playing B.play C.to play D.for playing
答
A.playing
have fun doing sth
答
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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答
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