______has been done to stop pollution by the government .

问题描述:

______has been done to stop pollution by the government .
A many B Much C Few D None

A和C一定不行,因为动词用的是has,而这两个词后面都应加复数.
D 中的none是指人,若指事应用nothing
B 泛指很多事情,可以用much.
整句译为:*为了减轻污染做了很多事.