How about this green one .为什么加one,不加可以吗

How about this green one .为什么加one,不加可以吗 How about the green one 翻译：How about this one how about this one,teacher? how about this one和 what about this one? how about this red one的意思 how about this one?good.()()are they? How about this one?同义句 How about this blue one?的意思 how about this one?搜汉语 请问every one后面可以加of吗,no one 为什么? What about this green one?What_________ these _____?