问：OG 123

123.In developing new facilities for the incineration of solid wastes, we must avoid the danger of shifting environmental problems from landfills polluting the water to pollutng the air with incinerators.

(A) landfills polluting the water to polluting the air with incinerators.

(B)landfills polluting the water to the air bring polluted with incinerators.

(C)the pollution of water by landfills to the pollution of air by incinerators.

(D)pollution of the water by landfills to incinerators that pollute the air

(E)water that is polluted by landfills to incinerators that pollute the air.

答案是C, 可是不明白的是在by之前是不是应该有个动词呢？有名词直接接by的结构吗？

请指教

by为介词，by landfills 应该是介词与名词的搭配吧。

记得没有规定介词前一定要有动词的呀。

个人意见！