The Backbone of North America refers to theA．Appalachian Mountains.B．Rocky Mountains.C．Cas

The Sun Dance is considered by many to be the most spectacular ritual of the North America

Which of the following is NOT a part of Canadian Constitution？A．British North America Act

The advantage of the educational system in North America is that students learn to thi

______is（are)considered as "the backbone of the continent" in America, and is（are) also kn

As the backbone of the North American continent, ______is known as the Continental Divide

The Backbone of North Atnerica refers to theA．Appalachian Mountains.B．Rocky Mountains.C．Ca