I have__in my bag.A.two rolls of film B.two roll of films C.two rolls of films

题目

I have__in my bag.A.two rolls of film B.two roll of films C.two rolls of films
正确答案是A,

答案

这里的film是胶卷的意思,不可数名词.
一卷胶卷的叙述是one roll of film.
如果是两卷胶卷当然就在roll后加s了.就好像two pieces of news.