—Theairisveryfreshinourcity.Thereisless

问题详情：

—The air is very fresh in our city. There is less ___________ than before.

—Yes. The government has taken action to protect the environment.

A. wood            B. pollution        C. noise           D. water

【回答】

B

【解析】A. wood 树木；B. pollution污染；C. noise 噪音；D. water水，根据The government has taken action to protect the environment可知句意：我们城市的空气很新鲜. 污染比以前少了。故选B。

知识点：名词

题型：选择题