【正确答案】 C

【答案解析】[听力原文]
Australia is an island and it is a continent. It is the largest island in the world but it is the smallest continent. It is almost 7.7 million square kilometres. Compared with China, China is about 2 million square kilometres larger.
Australia is in the south of the world. It lies between the Indian Ocean and the Pacific Ocean in the east.
Most of the western half of Australia is highland. But it is not very high, and the land is rather flat. Hight flat land is not called mountains. It is called plateau. The west of Australia is called the Western-Australian Plateau. It is about 300 miles high.
There is highland in the east of Australia, too. Some of it is plateau and some of it is mountains. The highest mountain is in the southeast. It is called Mt. Kosciusko. It is 2,228 miles high. This highland in the east is sometimes called the Great Dividing Range. It has this name because it divides the east coast from the rest of the country. Between the Great Dividing Range and the Western Australian Plateau land is low. This part of the country is called the Central Lowlands.
The only big river in Australia is the River Murray. It begins in the mountains in the southeast of the country and it runs westward into the Indian Ocean.

A、 Because it divides the east coast from the rest of the country.
B、 Because the land between the Great Dividing Range and the Western Australian Plateau is low.
C、 Because the east coast is called the Central Lowlands.
D、 Because it divides the southeast sea from the country.