他更喜欢自己动手粉刷房子——这真是件苦中作乐的差事。

He prefers to paint the house himself - it's ___a real ___labour ___of ___love.

对她而言，做一名音乐家是份苦中作乐的工作。

For her, being a musician is ___a ___labour ___of ___love.

写那本小说是件苦中作乐的事；它花了数年时间，但她从未后悔。

Writing that novel was ___a ___labour ___of ___love; it took years but she never regretted it.