6．Every time we turn on the TV or take a ride in a car，we could be adding to a problem called acid rain（酸雨）．In this article，we'll learn something important about acid rain．
The formation of acid rain
When people use fuels （燃料），such as coal and gasoline（汽油），poiso nous gases are given off．When these gases come together with rain，acid rain forms．Many power stations burn fuels in order to create the electricity（電） that we use in our homes and offices every day．Cars and trucks also send these gases into the air when they burn gasoline．When rain meets these gases，harmful things called acids form．This is acid rain．
The harm of acid rain
Acid rain destroys everything that it touches．It poisons our rivers，ponds and lakes and oceans along with the life in them．It pollutes our soils and crops，harm trees，and can even kill fish and plants．Acid rain also eats away at our buildings．
The prevention of acid rain
We need to reduce and even stop the pollution that gets into our air．Turn off lights，televisions and other electrical appliances（電器） if we are not using them．Walk and take a bike whenever possible．If we are travelling a long distance，take a bus or train to save fuel．
As research shows，acid rain harms our environment．But people everywhere can take small steps now to help protect our environment for future generations．
Whenever we use electricity or drive our cars we may add something bad to the air around us．And even worse，we may cause a terrible problem-acid rain．
The formation of acid rainWhen fuels，such as c oal and gasoline are burnt，harmful gases are sent into the air．When these gases （1）mixwith rain，acid rain forms．
The harm of acid rainAcid rain is greatly （2）harmful to the environment．It makes our rivers，ponds and lakes and oceans dirty and （3）causs the death of fish and plants．And it can corrode （腐蝕） the buildings we live in．
The prevention of acid rain Trying to prevent the pollution that gets into the air is（4）necessary．Keep the electrical appliances off while they are not in use．We can also use different ways of traffic to make less use of fuels．
Research tells us that acid rain harms our environment．So people around the world can take small steps now to make a （5）differenceto our kids．
分析 文章主語講述酸雨的形成，危害和抵御酸雨的措施．
解答 1．mix；考查動詞用法，根據(jù)原文句子 When people use fuels （燃料），such as coal and gasoline（汽油），poisonous gases are given off．When these gases come together with rain，acid rain forms．當人們使用燃料，例如煤和汽油，有毒的氣體釋放出來．當這些氣體和雨一起混合是，酸雨形成了，所以填"混合"mix．
2．harmful； 考查形容詞用法，根據(jù)原文句子Acid rain destroys everything that it touches．酸雨摧毀了它接觸的每個事物．所以酸雨對環(huán)境時有害的，故填有害的harmful．
3．causes；考查動詞用法，根據(jù)文章信息 It poisons our rivers，ponds and lakes and oceans along with the life in them．It pollutes our soils and crops，harm trees，and can even kill fish and plants．它毒害了我們的河流，池塘和湖泊連同里面的生命．它污染了我們的土壤和莊家，危害樹木，甚至能殺害魚和植物．所以酸雨造成了魚和植物的死亡，故填"引起，造成"cause，and 前面的動詞用三單，所以要填causes．
4．necessary；考查形容詞用法，根據(jù)原文句子We need to reduce and even stop the pollution that gets into our air．我們需要減少甚至停止污染進入我們的空氣．所以阻止污染進入空氣是有必要的，有必要的 necessary．
5．difference；考查名詞用法，根據(jù)原文信息But people everywhere can take small steps now to help protect our environment for future generations．但是現(xiàn)在人們無論在哪里都能夠做一小步去幫助我們下一代保護環(huán)境，所以我們做一小步都會對我們的下一代有影響，有影響，make d difference，故填difference．
點評 閱讀理解題題，考生注意通讀全文，在理解的基礎(chǔ)上，按要求做題，最好能在原文找出出處．
