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. 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. 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. 3, they are only one part of this forest's food chain. They feed on at least 87 species, including frogs. 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. 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. 2. 3. 4. 5.

1.E 2.D 3.C 4.B 5.A

【分析】
本题为英语补全短文题，解题思路如下：1. 通读全文，把握每段主旨与整体语境；2. 分析每个空白处前后的逻辑关系（如指代、顺承、因果、举例等）；3. 结合选项内容，匹配最符合语境的选项，同时注意每个选项仅用一次，有一个多余选项；4. 代入验证，确保短文通顺连贯。
【解析】
1. 空白1后句提到“世界上十分之一的已知物种在此可找到”，说明亚马逊区域物种丰富，对应选项E（This area has a great many species），衔接前文对亚马逊面积的介绍，符合语境。
2. 空白2前句指出森林有不同层次，后句以“Above that”（在那之上）引出上层内容，故空白处应对应“底层”，选项D（At the bottom is a system of roots under the ground）与后文的“Above that”形成对应，符合层次介绍的逻辑。
3. 空白3前句以美洲虎为例，后句主语“they”指代美洲虎，说明美洲虎在此生存，对应选项C（While a large number of jaguars survive here），衔接举例内容，符合逻辑。
4. 空白3后句提到美洲虎以青蛙为食，空白处应顺承青蛙的相关内容，选项B（These frogs, in turn, feed on insects which eat leaves and fruit）承接前文的青蛙，形成食物链的顺承，符合语境。
5. 空白5前句说明亚马逊产生大量氧气，选项A（So it is often known as the "lungs" of the planet）与前文形成因果关系，解释亚马逊被称为“地球之肺”的原因，符合逻辑。
【答案】
1.E 2.D 3.C 4.B 5.A
【知识点】
补全短文、语篇逻辑理解
【点评】
本题考查学生的英语语篇理解与逻辑推理能力，需结合上下文语境、指代关系及逻辑衔接解题，是初中英语常见的基础题型，难度适中。
【难度系数】
0.6