Can you tell Japanese apart from Chinese by their looks?
从相貌上 by one's looks,一般在简单句的句尾
表兄弟或表姐妹写法是cousin.So did four of my cousins是对的,省略了get married,也可以说So did my four cousins.
龙宝宝 baby dragon是对的
spoken English是对的,也说oral Englishfrom appearance可以吗from appearance是可以的，但因为我句中已经有了from，为避免用词重复所以用了by their looks，也更口语化一些。