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1、(25minutes)PartIVReadingComprehension(ReadinginDepth)Questions47to56arcbasedonthefollowingpassage.样题一ElNinoisthenamegiventothemysteriousandoftenunpredictablechangeintheclimateoftheworld.Thisstrange47happenseveryfivetoeightyears・ItstartsinthePacificOceanandisthoughttobecausedbyafailurei
2、nthetradewinds(信风)，whichaffectstheoceancurrentsdrivenbythesewinds.Asthetradewindslessenin48,theoceantemperaturesrise,causingthePerucurrentflowinginfromtheeasttowarmupbyasmuchas5°C.Thewarmingoftheoceanhasfar-rcachingeffects-Thehot,humid(潮湿的)airovertheoceancausessevere49thunderstorms.The
3、rainfallisincreasedacrossSouthAmerica,50floodstoPeru.IntheWestPacific,therearedroughtsaffectingAustraliaandIndonesia・Sowhilesomepartsoftheworldprepareforheavyrainsandfloods,otherpartsfacedrought,poorcropsand51・ElNinousuallylastsforabout18months.The1982-83ElNinobroughtthemost52weatherin
4、modernhistoiy.Itseffectwasworldwideanditleftmorethan2,000peopledeadandcausedovereightbillionpounds53ofdamage.The1990ElNinolasteduntilJune1995.Scientists54thistobethelongestElNinofor2,000years.Nowadays,weatherexpertsareabletoforecastwhenanElNinowill55,buttheyarestillnot56surewhatleadsto
5、itorwhataffectshowstrongitwillbe.注意：此部分试题请在答题卡2上作答。A)estimate；B)strength；C)deliberately；D)notify；E)tropical；F)phenomenon；G)stable；H)attraction；I)completely；J)destructive：K)starvation；L)bringing；M)exhaustion；N)worth；O)strikeStepOne：名fej：B)strength；F)phenomenon；H)attraction；K)starvation；
6、M)exhaustion；(B的后缀th,H、K^M的tion都是名词后缀)谓语动词:A)estimate；D)notify；O)strike(-ate极可能是动词,fy为动词后缀)非谓语动词:L)bringing；(・ing结尾)形容词:E)tropical；G)stable；J)destructive；N)worth:(E的・cal,G的able,J的tive是形容词后缀)副词:C)deliberately；I)completely；(ly加在形容词后为副词后缀)StepTvvo:本文第-段讲述了ElNino的成因，第二段讲影响，第三段进一步以举例的方式介绍影响
7、，第四段讲应对。总的来说介绍了厄尔尼诺现象发主的原因，以及对世界的气候和人类生活造成的巨大影响。一边浏览一边联想自己平时了解到的关于厄尔尼诺现象相关知识，从而帮助判断选项。StepThree：原文首句就提到了ElNino,如果不认识没有关系，因为笫一句后半段有climate这个单词,这说明ElNino与气候变化有关，注意第一句开头的Thisstrange_47_就是指ElNino,之后有动词happens，说明47题应该填一个名词，结合上下文，只有F)phenomenon适合。再看48题，也是一个名词的辨析，由空格Z前的介词in得知。前一句的failure和本句
