His parents and he walked home quieyly,saying nothing.改为同义句

His parents and he walked home quietly,without saying anything
when his parents and he walked home quietly,they didn't say anything
上一句是非谓语形式
下一句是还原成状语从句,其实就是解释了为什么用非谓语
再问： 可题目是 His parents and he walked home ____ ________.
再答： with silence 非要只有两个格子的话，就是用介词短语，他们闷声不响的回家了