.------- one of you breaks the window will have to pay for i

C,你如果觉得拗口可以换个方法读,把-ever换成 no matter-,这样你来读,只有C是正确的,No matter which one of you breaks the window will have to pay it.选项A和C的区别在于,Whoever后面不需要加one of you,whichever是哪一个的意思,而这里的one of you 的one不再是“一个”而是,一个人,所以 whichever one在这里等同于whoever的意思.