West of the Great Plains are the Rocky Mountains in which trade of the Rockies is developed to visit famous parks such as Yellowstone National Park and Rocky Mountain National Park.
A. gamble
B. gold
C. tourist
D. oil
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The carved by the Colorado River is 1.5 kilometers deep, 320 kilometers long and as much as 29 kilometers wide in some places.
A. Great Colorado
B. Grand Canyon
C. Great Divide
D. Grand View
is the largest city in the US Pacific Coast and is also the second largest city of America.
A. San Francisco
B. Los Angeles
C. Washington
D. Phoenix
The U.S. lies in North America, with Canada to the north, Mexico to the south, the Atlantic to its and the Pacific to its .
A. northern, east, west
B. central, east, west
C. southern, west, east
D. western, west, east
The continental United States has states.
A. 50
B. 49
C. 48
D. 35