第5部分：补全短文(第46—50题，每题2分，共10分)

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　　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 Atlantic Ocean. Some of the islands were formed by the eruption (爆发) 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 (海盗) such as the famous Blackbeard sailed 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 life on 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 small islands to bury treasure or hide on.