單項選擇題More than()of the population in the United States lived in city areas in 1988.

A.60%
B.75%
C.90%
D.50%


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1.單項選擇題One of the reasons for the growth of population in Florida is because of its()

A.expanding economy
B.large number of Cuban-Americans
C.climate
D.exotic food

2.單項選擇題The three states that have seen the fastest growth in population in the past 20 years are()

A.California,Arizona and New Mexico
B.California,Florida and Nevada
C.New Mexico,Texas and Florida
D.Arizona,Nevada and Florida

3.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

5.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