题目内容

_____ part is the most densely populated region in America.

A. The southern
B. The north-eastern
C. The western
D. The southeastern

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Detroit is famous for the production of _____.

A. automobile
B. timber
C. bamboo
D. cotton

The city _____ is given the nickname “Space City of U.S.A.”.

A. Boston
B. Houston
C. San Francisco
Detroit

What are the problems the U.S. economy has faced from time to time?

A. Recessions
B. Depressions
C. Inflation
D. All of the above

The United States has vast expanses of fertile soil that is well suited to ____.

A. raising cattle
B. growing crops
C. developing highways
D. digging wells

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