托业考试阅读背景材料练习（1）

关于美国的历史

The continent\'s first inhabitants walked into North America across what is now the Bering Strait from Asia. For the next 20,000 years these pioneering settlers were essentially left alone to develop distinct and dynamic cultures. In the modern US, their descendants include the Pueblo people in what is now New Mexico; Apache in Texas; Navajo in Arizona, Colorado and Utah; Hopi in Arizona; Crow in Montana; Cherokee in North Carolina; and Mohawk and Iroquois in New York State.

The Norwegian explorer Leif Eriksson was the first European to reach North America, some 500 years before a disoriented Columbus accidentally discovered \'Indians\' in Hispaniola (now the Dominican Republic and Haiti) in 1492. By the mid-1550s, much of the Americas had been poked and prodded by a parade of explorers from Spain, Portugal, England and France.