His teacher asked him to write a (six-hundred-word) composition.为什么这里要填six-hundred-word?
问题描述：
His teacher asked him to write a (six-hundred-word) composition.为什么这里要填six-hundred-word?
答
是形容词啊而且用连词符号组成单词形式,不加连词符号不是单词形容词,不能修饰后面的名词.