My parents are busy doing their work.同义句改成My parents ___ ____ their work.

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Myparentsarebusydoingtheirwork.同义句改成Myparents_______theirwork.Myparentsarebusydoingtheirwork.同义句改成My

My parents are busy doing their work.同义句改成My parents ___ ____ their work.
My parents are busy doing their work.同义句
改成My parents ___ ____ their work.

My parents are busy doing their work.同义句改成My parents ___ ____ their work.
考查了be busy doing sth===be busy wiht sth.现在就该明白了吧,兄弟,