大学英语四六级考试阅读提高的练习（4）

　　But, curiously, one of the rarest coins in the world is not made of gold, but of the relatively cheaper silver. In 1804, the United States mint struck 19,570 silver dollars. That is what its records show. Today only six of this original number remain and these are unlikely ever to reach the auction market. So what happened to some 19,564 large silver coins, not the easiest sort of things to lose? One of the more romantic theories is that they were part of the payment to Napoleon for the American territory then known as Louisiana. But they never reached France. Somewhere in the Gulf of Mexico, the ship transporting them was sunk, either by a storm or by pirates . The probable answer to the mystery is that they were melted downsince the silver value was greater than the actual value of the coin. What really happened to the rest will probably always remain a mystery. What is known is that whoever can come up with one will find himself instantly rich.

　　26. It can be inferred from passage that_______.

　　A. money buys as much as it did before

　　B. money does not buy as much as it did before

　　C. paper money buys more than metal money

　　D. metal money buys more than paper money

　　27. Which of the following is TRUE of a coin?

　　A. The longer it is held, the less valuable it becomes.

　　B. The more it wears out, the more valuable it becomes.

　　C. The less it gets scratched, the less it values.

　　D. The longer it lasts, the more it values.

　　28. According to this passage, one of the rarest coins in the world is made of A. silver B. gold

　　C. copper D. paper

　　29. Coins become more valuable because_______.

　　A. they wear out your purses and pockets

　　B. the price of metal goes up

　　C. they fall more readily into a category for collectors due to their duration

　　D. both B and C

　　30. What really happened to some 19,564 large silver coins?

　　A. They were melted down. B. They were sunk in the Gulf of Mexico.

　　C. It is still a mystery. D. They were stolen by pirates.