Extreme Amazon（亚马孙之最）
Twenty percent of all the water that goes into oceans around the world comes from one river﹣the Amazon．
The Amazon River begins in the Andes Mountains in Peru． It travels about 6000 kilometers to the Atlantic Ocean． It is the largest river in the world． It is also the second longest． Most of the Amazon's water comes from rain． During the rainy season， parts of the river are 190 kilometers wide．
The Amazon River goes through the world's largest rain forest． The Amazon rain forest is home to the highest number of plant and animal species（种类） on Earth． There are 2.5 million kinds of insects， such as the world's largest ant． At least 3，000 kinds， of fish， live there， and one﹣fifth of all the bird species in the world． Some of the Amazon's animals are dangerous， such as the anaconda， the largest snake in the world． But there are also gentle animals， like the sloth and the pink dolphin．
The Amazon is very important to Earth． There are still many kinds of animals and plants there that we don't know about． If we lose the Amazon， we will lose a big part of life on Earth．
The largest and （1） __ longest river in the world |
The world's（2） rain forest |
The world's largest ant and 2.5 million other insects |
Extreme Amazon |
（4） that live in the Amazon |
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（3） to the highest number of plant and animal species on Earth |
The anaconda，the largest snake in the world |
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