有读者问如何做这道题：
(1)I was disappointed with the film. I had expected_________to be much better.
A. that B. this C. one D. it
应选D。如果第一句是 I was disappointed with this (that)film ，第二句应填什么呢？你会说，当然应填 it 。而 the film 在此其实也相当于 this film 或 that film ，只不过其语气不那么强而已。所以这道题应填 it，不是吗？
那么填C对不对呢？不对。因为 one 虽可用作代词（或叫做支撑词），但总不失其“一个”的本义，只用以表同类，用在这里显然讲不通。但如用在下面两句中就对了：
(2)I was disappointed with the film. It was such a poor one .
(3)I was very disappointed with the film. It was the worst one that I have ever seen.
选A和B当然也不对，它们不能指代 the film ，正如不能指代 this film 或 that film 一样。
