综合类A级：补全短文the Caribbean Islands
What would you see if you took a cruise to the Caribbean 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 the Atlantic Ocean.______ (46)Many of the islands were formed by the eruption(爆发)of ancient volcanoes(火山).Others are low-lying coral islands that gradually rose from the ocean.
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.______(49)You can see why pirates such as the famous Blackbeard sailed these waters. There are countless small islands to bury treasure or hide on.
The weather of the Caribbean Sea is almost always warm and sunny.Sandy beaches line the coasts of many islands.______(50)Many tourists arrive on cruise ships.
A But life on the Caribbean Islands is not always paradise.
B The earliest name used by Europeans is the Indies，later changed to the West Indies.
C Theyre like a long necklace that stretches between North and South America.
D They are Cuba，Puerto Rico，Jamaica，and Hispaniola.
E This is why millions of tourists visit the islands each year
F Some of these islands are no more than tiny slivers(小片)of exposed coral.
参考答案：
46 C 第三段的第一句话说的是:加勒比群岛形成了一个锁链，把加勒比海与大西洋的其他部分分开。有可能构成答案的是c和D.因为它们的第一个词都是"They"，该词回指"The caribbean Islands".但是，"The caribbean Islands"只有古巴等四个国家组成不符合实际情况，因此c是正确的。
47 B 第四段的第一句话(主题句)说的是:加勒比群岛有好几个名字。这是一个总的概括，紧接着应该是具体的说明。B是具体的说明:欧洲人最早用的名字是印度群岛(theIrldies)，后来叫做西印度群岛(the West Indies)。
48 D 第五段的第一句话说的是:加勒比海有四个大的岛屿。这是一个总的说明。下面应当列举。D是列举。
49 F 第六段的第一句话说的是:加勒比群岛中的其他岛屿小得多。接着应该是进一步说明。F是进一步说明。
50 E 晟后一段讲到加勒比海的天气温暖，阳光充裕，许多岛屿的海岸有沙滩。这样的自然环境显然会吸引旅游者。因此E是正确的选择。