Comprehensive Academic English For GraduatesUnit 1 Presenting a SpeechRoad BuildingGood morning, everyone. Today Ill be talking about the relationship between road building and the development of the American economy during the 18th century. About 300 years ago, the United States economy was growing rapidly, mainly because of a booming trade in two important agricultural products: grain and cotton.Grain output in the eastern part of America increased quickly at that time due to the rap
