单项选择题
A.The Earliest People in North America. B.The Earliest Immigrants to North America. C.The People of the United States. D.Europeans Were the Earliest People Coming to the North Americ
A.five B.six C.seven D.eight
A.Twain was successful in writing at last. B.Twain was a famous humorist. C.Twain's writing style was easy to be understood. D.Twain wrote many poems about Mississipp