一道英语选择题,为什么选C,D项什么时候用?

题目

一道英语选择题,为什么选C,D项什么时候用?
What I need is nothing but a newspaper,_____that can kill the time on the bus.
A.it B.that C.one D.the one

答案

One
the one的例句如下：
he wants newspaper the one that can kill the time
注意看先行词,如果先行词有定冠词 a/ an /the 用 one
如果没有定冠词,用the one