EI Nino is the name given to the mysterious and often unpredictable change in the climate of the world. This strange 47   happens every five to eight years. It starts in the pacific 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 48, the ocean temperatures rise, causing the Peru current flowing in from the east to warm up by as much as 5℃.

       The warning of the ocean has far-reaching effects. The hot, humid (潮湿的)air over the ocean causes severe49 thunderstorms. The rainfall is increased across South America, 50 floods to Peru. In the West Pacific, there are droughts affecting Australia and Indonesia. So while some parts of the world prepare for heavy rains and floods, other parts face drought, poor crops and  51. 沪江四六级 //cet.hjenglish.com

       EI Nino usually lasts for about 18 months. The 1982-83 EI Nino brought the most 52 weather in modern history. Its effect was worldwide and it left more than 2,000 people dead and caused over eight billion pounds 53 of damage. The 1990 EI Nino lasted until June 1995. Scientists 54 this to be the longest EI Nino for 2,000 years.

       Nowadays, weather experts are able to forecast when an EI Nino will 55, but they are still not 56 sure what leads to it or what affects how strong it will be. 沪江四六级 //cet.hjenglish.com

 

[F] phenomenon  
[B] strength   
[E] tropical   
[L] bringing  
[K] starvation   
[J] destructive 
[N]  worth 
[A] estimate
[O] strike  
[I] completely
[C] deliberately
[D] notify

[G] stable  沪江四六级 //cet.hjenglish.com

[H] attraction

[M] exhaustion  沪江四六

级 //cet.hjenglish.com

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47【解析】选[F]。 空格前为一形容词，通常其后修饰名词，可推知空格处要填一单数名词。从前文可知，所填名词指代EI Nino（厄尔尼诺）这种奇怪的气候现象。选项中共有六个名词，而能指代EI Nino的只有[F] phenomenon（现象）。

48【解析】选[B]。从主谓搭配来看，空格处描绘信风在哪方面减弱（the trade winds lessen），选项中剩下的五个名词中能形容风力减弱的只有[B] strength(力量)。

49【解析】选[E]。选项中能修饰名词thunderstorms（雷暴）的形容词，并且和闷热、潮湿的空气气候现象相联系的只有[E]tropical（热带的），选项中其他两个形容词[J] destructive（毁灭性），与severe(严重的)意思重复，而 [G] stable（稳定的）不用来修饰thunderstorms。
沪江四六级 //cet.hjenglish.com

50【解析】选[L]。此处逗号起重要提示作用，逗号后面部分为伴随状态，起补充说明作用。选项中只有动词的现在分词形式符合题意，[L] bringing为正确选项。

51【解析】选[K]。从关键连词while，可知此处while前后两分句形成结构上和语义上的对比，从选项中剩下的四个名词中选出能和drought（干旱）、poor crops（农作物歉收）构成语义上的顺承关系的名词是[K] starvation(饥荒)。强干扰项 [M] exhaustion（耗尽枯竭）不能很好地描述poor crops现象。

52【解析】选[J]。此处填一形容词修饰weather。选项中只剩下两个候选形容词。从后一句话对其带来影响的描述(2,000 people dead) 可轻松地选对[J] destructive(毁灭性的)。

53【解析】选[N]。此处填一名词，能与eight billion pounds形成合理搭配，且修饰damage（损失），选项中只有[N] worth（价值）符合题意。 沪江四六级 h
ttp://cet.hjenglish.com

54【解析】选[A]。此处填一动词。选项中有三个动词为候选项。从宾语来看，the longest EI Nino for 2,000 years(两千年以来持续时间最长的厄尔尼诺现象)为结论性的话，排除[O] strike（打击）；[D] notify（通知）为不及物动词，后接介词of，不选；[A] estimate（评估）符合题意。

55【解析】选[O]。此处填一动词，主语为EI Nino，在两个候选的动词中，[D] notify（通知）主语通常为人，排除它。[O] strike作及物动词时表示“到达, 侵袭”，与题意相符。 沪江四六级 //cet.hjenglish.com

56【解析】选[I]。从空格后的形容词sure（确定的）可知此处填一副词。选项中两个副词completely(完全地)和deliberately（故意地），很容易能选I) completely（完全地）为正确选项。