试题题干
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South America
Located mostly (most) in the southern half of the earth, South America is a very ________ (interest) continent. The northern part of the continent is ________ (cover) by the Amazon Rainforest, which is home to thousands of the plant and animal species. It is a very important force ________ (shape) the world's weather and climate patterns. And it is also important for the ________ (develop) of the economy of South America. Products such as chocolate, rubber, coffee and many kinds of medicine are ________ (harvest) from the plants found in the rainforest. Even the liquid from the skin of some species of tree frogs are being used as ________ (experiment) medicines. Other parts of South America are very ________ (differ). The Andes Mountains spread over the ________ (west) part of South America. The ranges, about 5,500 miles long, are a continuous barrier, with many peaks rising beyond 20,000 49 (foot). Southern South America is an
extremely ________ (wind) and cold place where many species of penguins (企鹅)，seals and whales live.