When Christopher Columbus reached America, he thought he arrived in　21　.The population of Native Americans in the US: 　22　.Regions where Indians live: 　23　, 　24　or cities.Why young Indians leave their hometown:for 　25　reasons.Rate of unemployment in reservations:around 　26　percent.Jobs held by Indians:mostly 　27　and 　28　.Health problem: Indians commonly leads a(an) 　29　life than other Americans.College education: finished by at least 　30　of Indians over 25 years old.

正确答案：
21.Indies  
22.two million
23.reservations/ government land
24.tribal lands
25.economic  
26.fifty
27.low-paying  
28.unskilled  
29.shorter
30.nine percent
【录音原文】
The native people of North and South America were given the name “Indians” by the explorer Christopher Columbus. He thought he had reached the place called the Indies. In time, the terms American Indian and Indian became widely used.
About two million Native Americans live in the United States today. Some Indians lived on government land called reservations, or on tribal lands. Others live in cities.
Traditional culture remains strong in areas where large numbers of Indians live. But many Native Americans worry that their cultural traditions will be lost as young people leave these areas for economic reasons.
The economic situation of American Indians as a group is not good. About 50 percent of those who live on reservations have no jobs. Those who do have jobs earn less than other Americans. Most Indians hold low-paying unskilled jobs. Indians have many health problems and do not live as long as other Americans. But the situation is improving as more Indians are becoming educated. Today, most Native Americans graduate from high school. At least 9 percent of all Indians 25 years old or older have finished college. American Indians are trying to change their economic situation, improve their lives and honor their culture.

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