[04:47.06]Id be glad to help you after the touch.
[04:49.70]Thand you for your attention.
[04:51.97]14. What is the main topic of this talk?
[04:55.63]15. Who is probably listening to Mr.Britain?
[04:59.52]16. Which people are usually not allowed to use the stacks?
[05:05.14]Passage Three
[05:06.65]Today Im going to discuss transportation and communication
[05:10.28]in the earty 19th century in the United States.
[05:13.44]At that time,inland waterways provided North Americas most popular from of long distance transportation.
[05:20.34]Travel by river was often more convenient than taking a wagon over primitive country road
[05:26.06]especially when shipping heavy loads of farm products or household good
[05:30.16]Where the natural waterways were inadequate
[05:32.62]shallow canals were built.
[05:34.34]The Erie Canal,opened in 1825,connected the Great Lakes with the upper Hudson River.
[05:40.17]It allowed settlers in the Great Lakes region to send their crops eastward to New York City
[05:45.00]the mouth of the Hudson at a much lower cost.
[05:47.82]From there,crops could be shipped to other Atlantic ports.
[05:51.92]The construction of the Erie Canal also encouraged westward migration along inland waterways and helped populate the frontier.
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