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　　Caribbean Islands
　　What would you See if you took a cruise to the Cartbbean Islands? Palm trees and coconuts (椰子)?White beaches and clear，blue ocean?Colorful corals(珊瑚)and even more colorful fishes and birds?
　　You bet There are thousands of islands in the Caribbean Sea.They are famous for their warm，tropical climate and great natural beauty.
　　The Caribbean Islands form a chain that separates the Caribbean Sea from the rest of me Atlantic Ocean，Some of the islands were formed by the eruption(爆發(fā))of ancient volcanoes(火山)______(46)
　　The Caribbean Islands are known by several names._____(47)The explorer Christopher Columbus called the islands the Indies in 1492 because he thought he was near the coast of India.Later,Spain and France called the islands the Antilles.There are four large islands in the Caribbean Sea_______(48)These four islands are often called the Greater Antilles Together, they account for about 90 percent of the land area of the Caribbean Islands
　　The rest of the Caribbean Islands are much smaller.Some of these islands are no more than tiny slivers (小片)of exposed coral.You can see why pirates(海盜)such as the famous Blackbeard satled these waters._____(49)
　　The weather of the Caribbean Sea is almost always warm and sunny Sandy beaches line the coasts of many islands.This is why millions of tourists visit the islands each year______(50)
　　A But 1ife Oil the Caribbean Islands iS not always painful.
　　B The earliest name used by Europeans is the Indies，later changed to the West Indies.
　　C Others are low-lying coral islands that gradually rose from the ocean
　　D They are Cuba，Puerto Rico，Jamaica，and Hispaniola.
　　E Many tourists arrive on cruise ships.
　　F There are countless smallislands to bury treasure or hide on.
　　參考答案
　　46 C 第三段的第一句話說(shuō)的是：加勒比群島形成了一個(gè)鎖鏈，把加勒比海與大西洋的其他部分分開(kāi)。有可能構(gòu)成答案的是C和D。因?yàn)樗鼈兊牡谝粋�(gè)詞分別是others，，和“They”，該詞回指“The Caribbean Islands”。但是，“The Caribbean Islands”只有古巴等四個(gè)國(guó)家組成不符合實(shí)際情況，因此C是正確的。
　　47 B 第四段的第一句話(主題句)說(shuō)的是：加勒比群島有好幾個(gè)名字。這是一個(gè)總的概括，緊接著應(yīng)該是具體的說(shuō)明。B是具體的說(shuō)明：歐洲人最早用的名字是印度群島(the Indies)，后來(lái)叫做西印度群島(the West Indies)。
　　48 D 第五段的第一句話說(shuō)的是：加勒比海有四個(gè)大的島嶼。這是一個(gè)總的說(shuō)明。
　　下面應(yīng)當(dāng)列舉。D是列舉。
　　49 F 第六段的第一句話說(shuō)的是：加勒比群島中的其他島嶼小得多。接著應(yīng)該是進(jìn)一步說(shuō)明。F是進(jìn)一步說(shuō)明。
　　50 E 最后一段講到加勒比海的天氣溫暖，陽(yáng)光充裕，許多島嶼的海岸有沙灘。這樣的自然環(huán)境顯然會(huì)吸引旅游者。因此E是正確的選擇。