题目内容：

clothing made of man-made materials has certain advantages over __made of natural ones like cotton,wool or silk A one B what C that D the ones

优质解答

选c ,这里that 相当于the one 代指clothing .

追问：

别的选项能解释下不

追答：

one 是泛指可数名词单数 one =a /an +可数名词单数
the ones 特指可数名词复数

追问：

这题没特指?