四六级

　　英语四级阅读理解部分占四级总比分的35%，词汇理解(选词填空)占5%，是英语四级阅读部分中一大难题，为帮助考生攻克这一难关，文都小编整理了有关厄尔尼诺现象方面的填空练习，一起做一下吧，做完再对答案哦！

　　EI NIno is name given to the masterious and often unpredictable change in the climate of the world.This strange __1__ happens every five to eight years.It starts in the PAacific Ocean and is thought to be caused by a failure in the trade winds(信风)，which affects the ocean currents driven by these winds. As the trade winds lessen in __2__, the ocean comperatures rise causing the Peru current flowing in form the east to warm up by as much as 5°C.

　　The warming of the ocean has far-reaching effects.The hot,humid(潮湿的)air over the ocean causes severe __3__ thunderstorms.The rainfall is increased acrossAounth American __4__ floods to Peru.In the West pacific,there are droughts affecting Australia and Indonesia.So while some parts of the world perpare for heavy rains and floods,other parts face drought,poor crops and __5__.

　　EI Nino usually lasts for about 18 months The 1982-83 EI Nino brough the most __6__weather in mordern history. Its effect was worldwide and it left more than 2,000 people dead and caused over eight billion pounds __7__ of damage.The 1990 EI Nino will __9__, but they are still not __10__ sure what leads to it or what affects how strong it will be.

　　[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] strike

　　参考答案：

　　1.P phenomenon

　　2.B strength

　　3.E tropical

　　4.L bringing

　　5.K starvation

　　6.J destructive

　　7.N worth

　　8.A estimate

　　9.O strike

　　10.I completely

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