单项选择题
Between 1960 and 1990,a large number of people moved from（）
A.core cities to the suburbs B.rural areas to cities C.small cities to large cities D.None of the above
单项选择题 In the last great population movement,a large number of people moved to（）
单项选择题 According to historians and specialists in demography,there are（）great population movement(s)in the history of the United States.
单项选择题 During the third wave of immigration from 1890 to 1910,many came from（）
