Why would an animal kill itself? It seems a strange question, and yet it is one that has made some scientists curious for a long time. For there is a kind of animal called lemming（旅鼠）, that periodically killed themselves together, and no one knows just why!
The small creatures which live in the Scandinavian mountains, feed on a diet of roots and special insects and live in nests they dig underground. When their food supply is large, the lemmings live a normal and undisturbed life. 
However, when the lemmings’ food supply becomes too low to support the population, a singular migration（遷徙）begins. The lemmings leave their nests in groups. Great numbers of them begin to travel across the Scandinavian plains, a journey that may last weeks. The lemmings eat everything in their path, continuing their long march until they reach the sea. 
The reason for what follows remains unbelievable to naturalists. Upon reaching the coast, the lemmings do not stop but swim by the thousands into the sea. Most stay afloat only a short time before they tire, sink and drown. 
A common theory for this mass self-killing is that the lemmings do not realize that the ocean is such a huge body of water in their cross-country journey, the animals must cross many smaller bodies of water, such as rivers and small lakes. They may think that the sea is just another such swimmable path to go through. But no final answer has been found to the strange happening. 
【小題1】The passage is mainly about______. 

A．how lemmings find food
B．why animals kill themselves
C．the lemmings’ self-killing
D．the food supply in the Scandinavian mountains
【小題2】A reason for the lemmings’ self-killing might be that they______. 
A．go mad from a lack of food
B．hope to find fish for food
C．decide to reduce the population
D．think they can cross the sea
【小題3】Why are scientists curious about the lemmings’ behavior?
A．Because they are the only animals that live in Scandinavia.
B．Because it is very unusual for animals to kill themselves.
C．Because of the amount of food they can eat on their march to the sea.
D．Because they can gather together in such huge numbers.
【小題4】The underlined word “singular” means______.
A．unusual B．single C．wonderful D．common


【小題1】C
【小題2】D
【小題3】B
【小題4】A

解析試題分析：文章大意：介紹奇異的旅鼠集體自殺現(xiàn)象及對(duì)其原因的推測(cè)。
【小題1】C 主旨大意題第一段引出旅鼠定期集體自殺的話題，然后介紹他們的習(xí)性，接下來(lái)因?yàn)槭澄锕⿷?yīng)不足而進(jìn)行遷徙，到達(dá)海邊，然后集體渡海，體力不支死亡。最后一段是人們對(duì)于這種現(xiàn)象的推測(cè)。文章主要介紹的是旅鼠的自殺現(xiàn)象。
【小題2】D 細(xì)節(jié)理解題根據(jù)最后一段：旅鼠可能沒有意識(shí)到海洋那么廣闊，他們可能認(rèn)為大海不過(guò)是可以游過(guò)去的。
【小題3】B 推理判斷題根據(jù)文章最后一句：But no final answer has been found to the strange happening. 
但是對(duì)于這種奇特現(xiàn)象至今還沒有最終的解答，導(dǎo)致科學(xué)家們對(duì)于旅鼠的異常行為非常好奇。
【小題4】A 詞義猜測(cè)題旅鼠的這次遷徙導(dǎo)致了不同于尋常動(dòng)物遷徙的結(jié)果，所以這是unusual: 不同尋常的；非同尋常的。single: 單一的；單身的；單程的；wonderful: 奇妙的；極好的；common: 共同的；一般的；普通的。
考點(diǎn)：考查科普類文章閱讀。

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【小題1】What does the author say about historical buildings in the first paragraph?

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【小題2】Which of the following is true according to the author ?
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C．Some old buildings have spoilt the area they are in.
D．No one understands why people speak against new buildings.
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【小題4】What is the main purpose of the passage?
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科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

Environmental problems are becoming more and more serious all over the world. For example, cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories. Trees on the hills have been cut down and waste water is being poured continuously into rivers. Furthermore, wherever we go today, we can find rubbish carelessly disposed.
There are different kinds of pollutants, each of which comes from different sources. It is necessary to identify the source of pollution, in order to make a policy to eliminate them.
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These pollutions have greatly damaged our planet and continue to do so. In fact, pollution is threatening our existence. The whole ecological balance of the earth is changing. Massive destruction of environment has brought about negative effects and even posed a great threat to man’s existence.
We must face the situation that exists and take action to solve our environmental problems. For instance, new laws must be passed to place strict control over industrial pollution, the public must receive the education about the danger of pollution and so on.
The earth is our home and we have the duty to take care of it for ourselves and our later generation. Fortunately, more and more people have realized these problems. Measures have been taken to deal with these situations by the government. Laws have been passed to stop pollution, I hope the problems will be solved in the near future and our home will become better and better.
【小題1】 How many examples of environmental problems are given in the first paragraph?

A．2 B．3 C．4 D．5
【小題2】 Which of the following is TRUE according to the passage?
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C．Industrial pollution has been completely controlled.
D．Laws have been passed to stop pollution and protect our environment.
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A．2 B．3 C．5 D．6
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