【正确答案】 A

【答案解析】[听力原文]
Land covers about one-fourth of the earth"s surface.
The major divisions of the land are called continents. People usually speak of seven continents. They are Asia, Africa, Europe, North America, South America, Oceania and Antarctica. But two of them are one mass of land. They are Asia and Europe. Antarctica is the coldest continent. Asia, Europe and North America are totally in the Northern Hemisphere.
In addition to continents, the world has thousands of islands. Ice-covered Greenland is the largest.
The land has a great variety of surface features. They are called landforms. The most important landforms are plains, hills, mountains and plateaus. Since plains are mostly broad stretches of fairly level land, they are the main farming areas of the world. They are also the most densely settled portions of the earth"s surface.
Man has learned to make good use of the land and what is on it and what is in it. He uses the soil to grow crops. He builds his homes with lumber from the forests. Rock is crushed to make concrete for highways and buildings. Coal is burned to produce electricity. Iron ore is processed to make steel.
Here are many more ways in which man uses the resources of the land. As time goes on, he will learn more about the land and how it can be used. This is necessary in a world in which the population is increasing rapidly.