I was disappointed with the film,I had expected ------to be much better

题目

I was disappointed with the film,I had expected ------to be much better
为什么只能用it而不能用one?如果用it的话为什么后面加比较级?

答案

我对这部电影很失望,我本来期望它会好得多.
这里必须用it 来指代上文的the film.
至于为什么后面加比较级,相信你一看我前面的翻译就清楚了.