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What is 1 + 3?
a road that one must pay to use
an artifical waterway
in a canal, an enclosed with gates at each end used in raising or lowering boats as they pass from level to level
the idea popular in the U.S during 1800's that the country must expand its boundries to the pacific
a person who leaves a country or region to somewhere else
to add a territory to one's own territory
to give up by treaty
People who went to California during the Gold Rush of 1849
community experiencing a sudden growth in business or population