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（电） 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（电器） 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 （腐蚀） 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．
4．根据中文和英文提示，写一封意思连贯、符合逻辑、不少于50词的短文．短文的开头和结尾已给出，其词数不计入所要完成的短文内．所给英文提示词语仅供选用．请不要写出你的校名和姓名． 假如你叫李华，Tom是你初中阶段最要好的同学．初中生活即将结束，新的生活即将开始．请以邮件的形式给Tom写一段毕业留言：他（她）给你留下的深刻印象、你们在一起的快乐时光以及你对他（她）最美好的祝愿． 提示词语：tall，friendly…； play basketball，happy time，go to park…； best wishes，healthy，successful… Our life in middle school will come to an end soon．I'll never forget you． You are a friendly boy There's always a smile on your face and everybody likes to make friends with you．We used to play basketball on the playground．Sometimes we went to the park and had a good time there．I always laughed a lot when I was with you．At this very moment I'm saying goodbye to you，I just want to give you my best wishes：I hope you are happy and healthy forever!I hope you are successful in the future．．
一本好题口算题卡系列答案
