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單項選擇題

（）was an important immigration spot in late 19th century and early 20th century.

A.Ellis Island　
B.San Francisco
C.Hawaii　
D.Miami

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單項選擇題

The immigrants spread unevenly across the country,with（）having the largest percentage of immigrants.

A.Northeast
B.the West
C.Midwest
D.the South

單項選擇題

A major source of population growth is（）

A.immigration　
B.baby boom
C.rising birth rate　
D.larger number of young people