7．Relations between the United States and Spain were not very good in 1898．On February 15，a battleship called the USS Maine blew up and sank in the harbor at Havana，Cuba．More than 260Americans were killed．Many Americans thought that Spanish saboteurs （破壞者） had set an underwater mine that caused the explosion．
Witnesses and survivors had different versions of what happened．Some said that they heard two explosions．It was discovered that the magazine-which is a storage place for arms，ammunition（軍火），and explosives-had exploded．Questions were raised about what caused the first explosion．Did the first explosion come from outside the ship，causing the magazine to explode？Or，did something on the ship blow up the magazine？
Other witnesses said that there was only one explosion．If they are right，then what on the ship caused the magazine to explode？A theory supporting the two-explosion version was that rebels from Cuba had caused the explosion．The rebels were aware of the bad feelings between the United States and Spain．They would have been willing to cause trouble between the nations to bring an end to Spanish rule in Cuba．
The United States government issued an ultimatum（最后通牒） to the Spanish government to end its occupation of Cuba．When Spanish officials refused，Congress and President William McKinley declared war on Spain．The war did not last long，because the United Sates forced an early surrender．
More than 100years after the explosion of Maine，the cause of the explosion is still unknown．Many questions remain．If an attack from outside the ship caused the magazine to explode，why didn't witnesses see a splash in the water？Why were there no dead fish in the water if there was an external explosion？
With the mystery still unsolved，the question of what really happened to the USS Maine may never be answered．

（Note：Answer the questions or complete the statements in NO MORE THAN EIGHT WORDS．）
81．On February 15，1898，more than 260Americans lost their lives because ofthe explosion and sinking of the USS Maine．
82．According to the passage，the"magazine"was used tostore arms，ammunition，and explosives．
83．According to the two-explosion version，what's the probable purpose of the Cuban rebels to cause the explosion？To cause trouble and end the Spanish rule/occupation．
84．What's the main topic of the passage？The Mystery of the USS Maine．/The（possible）causes of the USS Maine's Explosion．

分析 本文介紹了導致 the USS Maine 爆炸的可能性的原因．

解答 81．the explosion and sinking of the USS Maine  細節(jié)理解題．第一段"a battleship called the USS Maine blew up and sank in the harbor at Havana，Cuba．More than 260Americans were killed"這句話可得出答案．
82．store arms，ammunition，and explosives 細節(jié)理解題．在第二段"It was discovered that the magazine-which is a storage place for arms，ammunition（軍火），and explosives-had exploded"可以得出當時magazine是用來存儲軍火等的地方．
83．To cause trouble and end the Spanish rule/occupation．根據(jù)第三段"A theory supporting the two-explosion version was that rebels from Cuba had caused the explosion"這句話告訴我們Cuban rebels 引起爆炸的目的．
84．The Mystery of the USS Maine．/The （possible） causes of the USS Maine's Explosion通過全文以及最后一段的介紹可知，這篇文章的主要目的就是介紹了USS Maine's Explosion可能的原因．

點評 此篇閱讀表達難度適中，考生在答題時需抓住第一段以及每段第一句話，從而迅速抓住主旨，在找細節(jié)時要采用定位法．

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