英语单选题，， 解释一下

cpollution是名词,第一空意思为人类制造了大量的水污染

polluted是什么意思 pollute什么意思

a lot of后肯定要接名词

而polluted为形容词,句中意思为"污染的水有害于人类健康",polluted修饰名词water

bhave do sth 是固定搭配,意思是让某人做某事,与let,make用法相同.而exchange for 意为交换

water pollution; the polluted water

exchange for

第一个是水污染，应该用污染的名词形式。。

第二个是过去分词做形容词，表示被污染的水

had somebody do something

因此要用动词原形。exchange sth for sth.表示用某物交换某物

29 C

第一个空填名词 pollution 第二个空填形容词，因为是被污染的空气所以用被动 polluted

38 B

have . do sth. 第一个空格填原形，排除A C

句意是用……交换……，因此选B，exchange sth. for sth.

C. pollution, polluted

第一个pullution是名词,water pollution是水污染的意思,第二个pullted是动词,意思是被污染的水。

B exchange, for

have do sth是个固定用法

句子意思是哪个男孩很淘气,他让女孩用玩具换了他的糖

29 C

人们造成了水污染，这里污染用名词pollution

被污染的水伤害人体健康，这里用分次形式形容水用 polluted

29. People caused a lot of water________, and the ______water did harm to their health.

C. pollution, polluted

1) cause sth.( water pollution)

2) . have sth done.

38. This boy is very clever. He had the girl ________ her toy _____ his candy.

B exchange, for

1) have . do sth.

2) exhange sth for sth.

but it is being polluted heavily polluted两个polluted都是什么意思，换句话说是什么结构？

两个polluted都是被污染的意思，heavily polluted就是严重污染的意思，起到强调作用

把前面的这个句子看成现在进行时态的被动态，它是主语从句，最后这个polluted是谓动(一般过去时)。

后面的polluted主要是起强调作用，意思是可是它正在被污染严重被污染。

一水多用的英文，就是循环利用水的那个意思，意思对了就可以了

It is important to beal with the rubbish in cities.

Our world was colorful,beautiful and full of life.But these years,people have built many factories along rivers.Many trees have been cut down.Many animals have lost their homes.Factories cause pollution.Rivers become polluted.

As a student,you should do every things in your everyday life to protect them.

First,stop wasting more water.

Second,throw waste things into different dustbins.For example,waste paper should be throw into paper recyclable bins.