综合解题

将选项分类之后，就得从文章中来寻找对应的线索了。选项与文章匹配的因素有两个，第一是词性，第二是词义。所以在读文章时，要通过各种手段来确定空格的词性与意义。

(一)确定词性，确定选项的选择范围

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1)关于动词的判断

前后都是名词短语，中间是动词 。

根据一句(包括从句)有且只有一个谓动的原则，其它地方如无谓语动词，则需要谓语动词;反之则不需要谓语动词。

Nowadays, weather experts are able to forecast when an El Nino will 55 , but.

(will后面必然是原形动词，一起构成谓语)

55. O strike

Scientists 54 this to be the longest El Nino for 2,000 years.

(此句后只有一个to be，是非谓语动词，故空格必为谓语动词;且空格前后均为名词性，也基本确定它是动词。)

54. A estimate

一个完整的句子之后再跟逗号，后面一般是非谓语动词短语。

The rainfall is increased across South America, 50 floods to Peru.

(前面是一个完整的句子，逗号后跟的，一般是非谓语动词短语。此题选项中非谓语动词只有一个，故直选之。)

50. L bringing

2)其它词的判断

形容词或名词修饰名词，限定词(the, this, that, a, my之类)后必有名词

This strange 47 happens every five to eight years.

47. F phenomenon

The hot, humid (潮湿的) air over the ocean causes severe 49 thunderstorms.

49. E tropical

El Nino usually lasts for about 18 months. The 1981-83 El Nino brought the most 52 weather in modern history.

(前面是最高级的修饰语，自然是形容词。)

52. J destructive

副词修饰形容词或动词

…, but they are still not 56 sure what leads to it or what affects how strong it will be.(修饰形容词sure, 当为副词)

56. I completely

谓语动词前有名词主语

This strange 47 happens every five to eight years.

(happens是谓语动词，也可知前面为名词短语，缺一个核心名词。)

47. F phenomenon

介词后面必有名词

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 °C.

(在介词in的后面，当为名词无疑，此处整个短语来修饰lessen减少，当为在某个方面减少。)

48. B strength

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