Section A

Direction: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the center. You may not use any of the words in the bank more than once.

Questions 47 to 56 are based on the following passage.

El 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 (信風(fēng)), 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 warming of the ocean has far-reaching effects. The hot, humid (潮濕的) 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 .

El Nino usually lasts for about 18 months. The 1982-83 El 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 El Nino lasted until June 1995. Scientists 54 this to be the longest El Nino for 2,000 years.

Nowadays, weather experts are able to forecast when an El Nino will 55 but they are still not 56 sure what leads to it or what affects how strong it will be.

注意：此部分試題請(qǐng)?jiān)诖痤}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) strike