Exercise 20. Insert the missing words and word combinations: America is the land of … … including the weather. The northern states and … have extremely cold winters. The broad Mississippi River is the … third river after the … and the Amazon. A wealth of mineral provides a … … for American industry. The Constitution operates today and sets the basic forms of the US government. Many different cultural traditions, … sympathies, racial … and religious affiliations make up the people of the USA. There is the Federal … which is located in Washington, D.C. The House of Representatives is headed by the …. The … branch of the government is headed by the Supreme Court. The 50 states represent the … number of states.