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18.In recent years,the Earth has been getting warmer.Average temperatures have risen.Possibly this is natural,but probably we are causing it.Modern people use a lot of electricity and drive a lot of cars.This puts carbon dioxide into the air and helps to make the planet warmer.When we hear this news,we may smile.No one likes long,cold winters,but,unluckily,there are many bad points about a warmer Earth.
First,the ice at the Poles melts and becomes water.The result is that the sea level becomes higher.Low islands will disappear.Cities on the coast will be in danger from the sea.Will Tokyo,Bangkok,Hong Kong and Shanghai become like parts of Holland-lower than the sea?Possibly we will have to build walls to keep the water out.Typhoons will become even more dangerous and frightening.
Sadly,the second point is that storms will become bigger.Super-typhoons will be born in the Pacific and do great damage to East Asia.The same will happen to the Eastern United States.
As the weather changes,some places that now have rain will become dry.The farmers will not be able to grow plants.Maybe some dry places will become wet-we don't know,but we will soon find out,and the change will cause many problems.There might be wars because of it.

38.What will happen to low islands when the Earth gets warmer and warmer?B
A.They will melt and become water.
B.They will be under the water.
C.They will become higher.
D.They will keep out the water.
39.In the last sentence,"it"refers toA.
A.the change of weather       
B.the power of the United States
C.the ice at the Poles   
D.the average temperature
40.Which of the following sentences is false?C
A.Shanghai will possibly build walls to prevent the water,like parts of Holland.
B.The farmers will not be able to grow plants because of the dry weather.
C.Electricity puts carbon dioxide into the air.
D.The warmer the Earth is getting,the higher the average temperature is.
41.Which is the best title of this passage?B
A.The Earth Is Getting Warmer 
B.Global Warming Problems
C.We Made the Earth Warmer 
D.How to Protect the Earth.

分析 最近這些年,地球已變得越來越溫暖,平均氣溫上升.也許這是自然現(xiàn)象,但這也許是我們導致的.現(xiàn)代人用電很多,開車很多.這會向空氣中排放二氧化碳,從而加劇地球變暖.當我們聽到這一消息時,我們也許會笑.沒有人喜歡漫長而寒冷的冬天,但不幸的是,地球變暖有很多壞處.首先,南北極的冰塊融化,變成水.結果是,海平面上升,低處的島嶼將消失.海岸附近的城市將面臨被海水吞沒的危險.東京、曼谷、香港和上海將變成像荷蘭的省份--低于海平面?也許我們將不得不修筑很多高墻以阻擋海水進入.臺風將更加危險和恐怖.
令人沮喪的是,第二點是,暴風將更加強大.超臺風將來自太平洋,對東亞產(chǎn)生極大危害.同樣的事情也會發(fā)生在美國東部.
隨著天氣的改變,目前下雨的地區(qū)將變干旱.農(nóng)民將無法種植作物.也許有些干旱地區(qū)將變濕潤,我們無法知道,但我們很快會發(fā)現(xiàn),而且這種變化將導致很多問題.也許會因此而發(fā)生戰(zhàn)爭.

解答 38.B.細節(jié)理解題.
根據(jù)第2段中"Low islands will disappear"可知,低處的島嶼將消失,這和本句的"處于水面以下"同義.故選B.
39.細節(jié)理解題,對詞語的詞義理解.
根據(jù)最后一句"There might be wars because of it"也許會因此而導致戰(zhàn)爭.這里的"it"要往前推,才能知道具體內(nèi)容.再看前一句"Maybe some dry places will become wet-we don't know,but we will soon find out,and the change will cause many problems"也許有些干旱地區(qū)會變濕潤,我們不知道,但我們很快會發(fā)現(xiàn).但這種變化將導致很多問題.這里逐步明朗,"此"(it)指變化(change).那這種變化是什么變化?本段開頭指出"As the weather changes,some places that now have rain will become dry"隨著氣候的變化,現(xiàn)在有雨的某些地方將變干旱.所以,這種變化就是氣候的變化(weather change/the change of weather).故選A.
40.C.推理判斷題.
根據(jù)第2段"Possibly we will have to build walls to keep the water out"人們將不得不修筑高墻以阻擋海水.所以A說的正確,根據(jù)最后一段頭兩句所述可知,地球已變得越來越溫暖,平均氣溫上升.所以B也是正確的,根據(jù)第1段中"Modern people use a lot of electricity and drive a lot of cars.This puts carbon dioxide into the air"可知,現(xiàn)代人使用很多電力和汽車,這種做法(情況)會向空氣中排放二氧化碳.而不是電力本身向空中排放二氧化碳.所以C所言錯誤,符合題意.根據(jù)第一段頭兩句可知,地球變暖,平均氣溫已上升.所以D也是正確的,但不符合題意.故選C
41.B.主旨大意題.
本題要求選擇文章題目,亦即主旨大意.
從各段大意看,第1段為全球變暖的成因.第2段、第3段和第4段為全球變暖的危害.綜合起來,文章論述的是全球變暖的問題(危害).故選B.

點評 首先要仔細閱讀短文,掌握大意,然后結合具體的題目,再讀短文,從中找出相關信息,就可以確定正確答案.

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