4.Our planet Earth is comparatively small,with only about 24,902miles around the equator (赤道).Its surface area may seem largest at 196,935,000sq.miles,but of this,70% is covered by sea.The actual land surface covers some 57,500,000sq.miles-29% of the total surface area.
Once again,this seems vast until we take into account the largely uninhabited(未居住的)regions such as the huge wastes of the Arctic and Antarctic,the deserts and wetlands.These regions are not always totally uninhabited,but they can usually support only very small populations.
At present there is still enough space on Earth for humans and wildlife,but what of the future?Our world cannot grow any larger,yet the human population keeps growing every year!As of July 2008,there were almost 6.7billion people on the planet,and current estimates (估計(jì)) suggest that the population could be as high as 9.1billion by as soon as 2050.
While the birthrate is slowing a little in parts of the Northern Hemisphere(半球),in many other parts of the world,including developing countries,populations continue to grow.This population explosion is responsible for most world environmental problems today; so whether our main concern is to breathe cleaner air,to drink purer water,to eliminate (消除) pollution,to protect wildlife and countryside,to produce more food to eat or to reach a higher standard of living generally,our chances of achieving any of these things become faint as the population increases sharply.The Earth's resources are vast but limited.We have a tendency to look to the short-term,rather than seeing the bigger picture of the future.
This is why it is so important that young people learn about looking after the planet-so that future generations of adults act responsibly with regard to(關(guān)于) the environment and create a future that is continuable,both for humans and all the other species with which we share our world.
29.What does the author worry aboutA
A.Whether there is enough space for creatures in the future.
B.The Earth is turning smaller and smaller.
C.How to find ways to live in uninhabited regions.
D.What people will live on in the future.
30.According to the text,we can infer thatA.
A.the population will increase by 0.6billion every ten years
B.the birthrate around the equator is a little low
C.population explosion is caused by environmental problems
D.more population brings more resources
31.What does the underlined word"faint"meanC
A.Important.
B.Necessary.
C.Slight.
D.Interesting.
32.Which of the following ideas is suggested by the authorB
A.Taking strong measures to control the birthrate.
B.Calling on the young to care for the planet.
C.Saving the Earth's natural resources.
D.Protecting the endangered species.

分析 本文屬于說(shuō)明文閱讀,作者通過(guò)這篇文章主要向我們描述了作者擔(dān)心未來(lái)是否有足夠的生物空間,號(hào)召年輕人愛(ài)護(hù)地球.

解答 AACB
29.A.細(xì)節(jié)理解題.根據(jù)第三段:At present there is still enough space on Earth for humans and wildlife,but what of the future?Our world cannot grow any larger,yet the human population keeps growing every year可知作者擔(dān)心未來(lái)是否有足夠的生物空間;所以A選項(xiàng)是正確的.
30.A.推理判斷題.根據(jù)第三段:As of July 2008,there were almost 6.7billion(十億) people on the planet,and current estimates(估計(jì)) suggest that the population could be as high as 9.1billion by as soon as 2050可知.人口將增加0.6billion每十年;所以A選項(xiàng)是正確的.
31.C.詞義猜測(cè)題.根據(jù)倒數(shù)第二段:our chances of achieving any of these things become faint as the population increases sharply可知我們獲得這些東西的機(jī)會(huì)變得微弱的人口的急劇增加;意為微弱;所以C選項(xiàng)是正確的.
32.B.推理判斷題.根據(jù)最后一段:adults act responsibly with regard to the environment and create a future that is continuable,both for humans and all the other species with which we share our world可知作者號(hào)召年輕人愛(ài)護(hù)地球;所以B選項(xiàng)是正確的.

點(diǎn)評(píng) 閱讀理解題測(cè)試考生在閱讀基礎(chǔ)上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關(guān)系,對(duì)未說(shuō)明的趨勢(shì)或結(jié)局作出合理的推斷;或根據(jù)作者所闡述的觀點(diǎn)理論,對(duì)文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細(xì)閱讀短文,完整了解信息,準(zhǔn)確把握作者觀點(diǎn).

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