单项选择题

Passage Two

The Indian ’Ocean is the third largest ocean in the world. Only the Pacific and the Atlantic are larger. More than one-fifth of all the world’s water supply is in the Indian Ocean. The Indian Ocean touches four different continents. To the south is Antarctica and to the east is Australia. Africa lies to the west and Asia lies to the north. There are several important islands in the Indian Ocean. These include Madagascar, the largest one, which is near Africa, and Sri Lanka, which is near India. There is also a group of islands called the Seychelies near the African coast. The Indian Ocean is extremely important to the countries in southeast Asia. Strong winds from the Indian Ocean bring warm weather, and heavy rains are necessary for growing food.

Of all the oceans in the world, the Indian Ocean contains more than（）

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