题目内容：

They are all nice and help to each other.改为同义句
改为同义句 改为同义句 改为同义句 改为同义句 改为同义句
（ ）（ ）（ ）are nice and helpfull to each other.

优质解答

juanhexiaolong说的不对,应该是all of them
因为both在此句中意为“两者”.根据原句的意思,不可能是两个人,而all指两人以上,所以应该是all of them