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1、学 海 无 涯 1 O Original:riginal: Why do some animals die out?Why do some animals die out? In the past two hundred years people have caused many kinds of animals to die out-to become extinct. People keep building houses and factories in fields and woods. As they spread over the land, they destroy animal
2、s homes. If the animals cant find a place to live, they die out. Sixteen kinds of Hawaiian birds have become extinct for this reason. Other animals, such as the Florida Key deer, may soon die out because they are losing their homes. Hunters have caused some animals to become extinct, too. In the las
3、t century, hunters killed all the passenger pigeons in North America and most of the buffalo. Today they are fast killing off hawks and wolves. Pollution is killing many animals today, too. As rivers become polluted, fish are poisoned. Many die. Birds that eat the poisoned fish cant lay strong, heal
4、thy eggs. New birds arent born. So far, no animals have become extinct because of pollution. But some, such as the bald eagle and the brown pelican, have become rare and may die out. Scientists think that some animals become extinct because of changes in climate. The places where they live become ho
5、tter or cooler, drier or wetter. The food that they eat cannot grow there any more. If the animals cant learn to eat something else, they die. Dinosaurs may have died out for this reason. S Summary:ummary: Model 1:Model 1: In this passage/article, the author mainlyIn this passage/article, the author
6、 mainly（主要地）（主要地） talks about/tells us / This article/ passage talks about/tells us / This article/ passage mainly tells usmainly tells us why in the past two hundred years, many kinds of animals have died out. OverallOverall （总体（总体 上来说）上来说）, , there are several reasons for it. FirstFirst, people ke
7、ep building houses and factories in fields and woods, which destroys animals homes. Second/SecondlySecond/Secondly, hunters killing has also caused some animals to become extinct. BesidesBesides, some animals arent able to bear strong offspring and nor do they have enough food to eat because of poll
8、ution and climatic changes. I In a wordn a word, , peoples keeping building houses and factories in fields and woods, hunters killing and pollution and climatic changes are the reasons which caused many kinds of animals to die out-to become extinct. Model 2: This paper deals with This paper deals wi
9、th ( (论述论述) )/ This article focuses on the topics of / This article focuses on the topics of / This paper provides an This paper provides an analysisanalysis （分析）（分析） of / This paper expressesof / This paper expresses （表达）（表达） views onviews on the reason why in the past two hundred years, many kinds
10、 of animals have died out. On the whole(On the whole(总体上来说总体上来说) ), there are several reasons for it. To begin withTo begin with（首先）（首先）, people keep building houses and factories in fields and woods, which destroys animals homes. FurthermoreFurthermore（其次）（其次） , it is hunters killing that has also
11、caused some animals to become extinct. In additionIn addition（另外）（另外）, owing to pollution and climatic changes, neither do some animals can bear strong offspring nor they can have enough food to eat. I In n summarysummary（总而言之）（总而言之）, , peoples keeping building houses and factories in fields and woo
12、ds, hunters killing and pollution and climatic changes are the reasons which caused many kinds of animals to die out-to become extinct. Model 3: (The writer of this essay) tries to explore(The writer of this essay) tries to explore（探讨）（探讨） / (The writerThe writer of) this paper discussesof) this pap
13、er discusses（讨论）（讨论） /analyzes/analyzes （分析）（分析） /elaborates/elaborates （阐述）（阐述） why in the past two hundred years, many kinds of animals have died out. There are several reasons for it. OverallOverall, there are several reasons for it. First of allFirst of all, people keep building houses and facto
14、ries in fields and woods, which destroys animals homes. WhatWhats s more/ moreovermore/ moreover, hunters killing has caused some animals to become extinct as well. Last but not Last but not 学 海 无 涯 2 leastleast, because of pollution and climatic changes, some animals arent able to bear strong offsp
15、ring and nor do they have enough food to eat. T To concludo conclude, e, peoples keeping building houses and factories in fields and woods, hunters killing and pollution and climatic changes are the reasons which caused many kinds of animals to die out-to become extinct. 注：注： 开头总述可用的模版：开头总述可用的模版： In
16、 this passage/article, the author mainly talks about/tIn this passage/article, the author mainly talks about/tells us/ This article/ passage mainly tells ells us/ This article/ passage mainly tells usus. . This paper deals with / This article focuses on the topics of / This paper provides an analysis of This paper deals with / This article focuses on the topics of / This paper provides an analysis of / This paper expresses views/ This paper expresses views onon. . (The wr
