A、The English. B、The Dutch. C、American Indians. D、Blacks from Africa. C题目问最早在美国定居的是什么人。短文中可以听到“The first Americans were Indians”

There is a great deal of land in the United States, but there are also a great many people. Where did people come from?
    The first Americans were Indians (26) . Today there are about 900, 000 American Indians. There is one part of the country with an especially large Indian population. That is the southwest.
    Blacks first came to America from Africa as slaves. President Lincoln freed the slaves in 1863. About eleven percent of the present American population are Blacks.
    The first immigrants in American history came from England and the Netherlands (28) . Soon immigrants began to arrive from many other countries, and they are still arriving. In 1790, the new nation had fewer than four million. Today there are more than 210 million (27) . These include people from all parts of the world.