选词填空(Banked Cloze)是四级考试改革之后出现的新题型,主要考察考生对连贯性,一致性,逻辑性等语篇整体特征以及单词正在实际语境中的理解,四级考试在即,大家一起熟悉一下新题型吧~~  
(今天是选自2006年6月的新题型,值得仔细研究一下~~)
   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 severe_49_ 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_.
    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.

[A] estimate                                  [I] completely
[B] strength                                  [J] destructive
[C] deliberately                            [K] starvation
[D] notify                                      [L] bringing
[E] tropical                                   [M] exhaustion
[F]) phenomenon                          [N] worth
[G] stable                                      [O] strike
[H] attraction
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