1.The United States of America is a country on the continent of North America.
2.The United States is the third biggest country in the world.
3.Barack Obama is president of the USA.
4.Washington is the capital city of the USA.
5.In the United States of America there are 50 states.
6.New York is the largest city of USA.
7.The United States is a world-renowned center of higher education.
8.Population of USA amounts 308,646,000 people.
9.Total arena of USA amonts 9,826,675 km2
10.The United States has a capitalist economy.