Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor.
8
By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situationsW4，the forests become suitable for large hoofed plant eaters to move around and for small plant eaters to get their food as well.
What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vastW5 areas of forest and savanna, greatly changing and worsening the whole ecosystem.
本文主要讲述的是在非洲草原的生物链中大象的重要作用，它不断的寻找食物拓宽了其他动物的生存空间等。
1．What is the passage mainly about? A．Disappearance of African elephants.
B．Forests and savannas as habitats for African elephants. C．The effect of African elephants\' search for food. D．The eating habit of African elephants.
答案 C [主旨大意题。本文主要讲述的就是在非洲草原的生物链中大象的重要作用，它不断的寻找食物拓宽了其他动物的生存空间等。故C正确。]
2．What does the underlined phrase “setting the terms” most probably mean? A．Fixing the time. B．Worsening the state. C．Improving the quality.
D．Deciding the conditions.
答案 D [词义猜测题。根据文章“As a big plant eater, it largely shapes the forest-and-savanna(稀树草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.”说明非洲大象塑造了草原的环境，也决定了其他动物的生存条件。故D项正确。]
3．What do we know about the open spaces in the passage? A．They result from the destruction of rain forests. B．They provide food mainly for African elephants. C．They are home to many endangered animals.
D．They are attractive to plant-eating animals of different kinds.
答案 D [细节理解题。根据文章“This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant eaters.”说明开放的空间对于其他的食草动物也很重要。故D项正确。]
★4.The passage is developed mainly by________. A．showing the effect and then explaining the causes B．pointing out similarities and differences C．describing the changes in space order D．giving examples
9
答案 A [篇章结构题。本文主要通过描述大象的行为带来的具体影响以及对这些影响的原因的解释。故A项正确。]
W重点单词
1．existence n. 存在 2．desire v．/n. 欲望；要求 3．numerous adj. 许多的；很多的 4．situation n. 情况；形势 5．vast adj. 广阔的；巨大的 P重点短语
1．of great importance 很重要的 2．to a great extent 在很大程度上 3．result in 导致 S句式仿写
原文：It is the elephant\'s great desire for food that makes it a disturber of the environment and an important builder of its habitat. (强调句型)
译文：正是大象对食物的欲望使它成为环境的破坏者和栖息地的修建者。
仿写：It_was_the_culture_rather_than_the_language_that made it hard for him to adapt to the new environment abroad.
是文化而不是语言，使他很难适应国外的新环境。
Passage 4 限时：6分钟 体裁：议论文 题材：健康类 难度：易词数：283
With the development ofP1 society, the choice of food and drinks for children
is more diversified than ever before. However, every coin has two sides. Many facts suggest that children are overweightW1 and the situation is getting worse, according to the statisticsW2. I feel there are a number ofP2 reasons for this.
Some people blameW3 the fact that we are surroundedW4 by shops selling
unhealthyW5，fatty foods, such as fried chicken and ice cream, at low prices. This
has turned out a whole generation of grown-ups who seldom cook a meal for themselves. If there were fewer of these restaurants then probably children would buy less take-away food.
There is another argument that blames parents for allowing their children to become overweight. I agree toP3 this, because good eating habits begin early in life, long before children start to visit fast food shops. If children are given fried chicken and chocolate rather than healthy food, or are always allowed to choose what they eat, they will go for sweet and salty foods every time, and this will carry on throughout their lives.
10
There is a third reason for this situation. Children these days take very little exercise. They do not walk to school. When they get home, they sit in front of the television or their computers. Not only is this an unhealthy pastime (消遣), it
also gives them time to eat more unhealthy food.S What they need is to go outside
and play active games or sports.
The above are the main reasons for this problem, and therefore we have to encourage young people to be more active, as well as guiding them away from fast food shops and bad eating habits.
百度搜索“70edu”或“70教育网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，70教育网，提供经典高考高中(课标通用)2024高考英语一轮复习专题19篇章结构题教学案资料(4)在线全文阅读。
相关推荐：
