一道sat语法题,

问题描述:

一道sat语法题,
The people sitting behind me in the movie theater were talking throughout the film and would not keep their (voices) down even after being asked to do so.
我知道这里voice为什么加s了,谁能在给我说说类似的词?

smell 也可以这么用.英语里面的不可数名词其实很多特定的情况下就可以当可数名词用.