二、接着，Millie用PPT介绍了亚马逊雨林，带同学们沉浸式感受这片雨林的魅力。阅读她的介绍，将下面选项还原到文中空白处，使短文内容完整、通顺，每个选项只能用一次，其中有一个选项是多余的。
Welcome to the Amazon rainforest. As the largest rainforest in the world, it plays an important role in keeping the balanced ecosystem on earth. With an area of around 6 million square kilometres, the Amazon rainforest is more than half the size of China.
E
1
. Actually, one in ten known species in the world can be found here.
Of the 390, 000 plant species known to us, more than 40, 000 can be found in the Amazon. There are different levels in the forest.
D
2
. Above that is leaf litter on the dark forest floor. The next level is made up of shorter plants with large leaves. Then there are the towering ancient hardwoods, and finally the tops of the trees which are taller than any other level of trees in the forest. Each level of the forest forms its own little world, home to different kinds of living things.
More than 1, 300 species of birds and over 400 species of mammals(哺乳动物) hide among the forest's plant life. The jaguar is one example.
C
3
, they are only one part of this forest's food chain. They feed on at least 87 species, including frogs.
B
4
.
The Amazon rainforest is a treasure house of species that can be used for food or medicine. What's more, the Amazon rainforest breathes life into the planet by producing over 20 per cent of all the earth's oxygen.
A
5
.
A. So it is often known as the "lungs" of the planet
B. These frogs, in turn, feed on insects which eat leaves and fruit
C. While a large number of jaguars survive here
D. At the bottom is a system of roots under the ground
E. This area has a great many species
F. The bottom of the trees are taller
1.
E
2.
D
3.
C
4.
B
5.
A
