【正文】 h food，their numbers may decrease.如果它們的棲息地受到威脅或者它們找不到足夠的食物，它們的數(shù)量就會減少。ve finished with it，simply wipe it clean with a damp cloth.②He wiped the marks off the wall.　varied ，形形色色的(教材P52) The reasons for extinctions are varied.滅絕的原因多種多樣。[知識拓展]die away 　 逐漸減弱，逐漸模糊，逐漸消失die down 逐漸降低，逐漸平息die off 相繼死去die of 死于(內(nèi)因)die from 死于(外因)[即學(xué)即練]——單句語法填空①As the region is being hotter，this kind of grass is dying off．②Their chatter and laughter die away as the group rushed out of the classroom.③When all the guests had left，the whole house died down．④We need to take action before all the endangered animals died out．　wipe out 徹底毀滅(教材P52)Extinctions，where entire species are wiped out，are not unusual in our Earth39。然后打開電視機(jī)，無聊地?fù)Q著頻道。 ，改變(教材P108～109)We definitely need to switch to different forms of power as soon as possible.我們當(dāng)然需要盡快轉(zhuǎn)到不同形式的能量。速讀課文，完成下列任務(wù)Ⅰ.閱讀判斷判斷以下句子提供的信息是正確，還是錯誤，還是沒有提及：1．Over 90% of all species that ever lived on the earth are now extinct.A．Right.　 B．Wrong.　　 C．Not mentioned.2．There were about six extinctions in the past.A．Right. B．Wrong. C．Not mentioned.3．It is because of human activities that species are dying out faster than before.A．Right. B．Wrong. C．Not mentioned.4．Experts say that it is too late to prevent the sixth extinction.A．Right. B．Wrong. C．Not mentioned.5．Black robins are likely to disappear on the earth in the next century.A．Right. B．Wrong. C．Not mentioned.[答案]　1—5　ABABCⅡ.補(bǔ)全信息選擇正確選項填入空白處，補(bǔ)全所給句子提供的信息：A．which occurred 66 million years agoB．when life on Earth has almost endedC．where entire species are wiped outD．where plants and animals can be protectedE．a(chǎn)t which this is now happeningF．who have studied the issue1．Extinctions， ，are not unusual in our Earth39。野生動物工作者開始了飼養(yǎng)黑知更鳥的計劃。黑知更鳥黑知更鳥是人類從滅絕中拯救出來的鳥類。例如，我們需要采取措施拯救瀕危物種，包括建立特別保護(hù)區(qū)，在這里動植物可以得到保護(hù)。我們的世界和我們的生活依賴于動物和植物之間的平衡。有很多為什么如此多的物種滅絕的原因：空氣和水污染，森林被破壞，工業(yè)化種植和過度捕撈。這一次，人類活動將是罪魁禍?zhǔn)?。發(fā)生在6 600萬年前的第五次滅絕事件導(dǎo)致了恐龍的滅亡。譯文參考第六次生物大滅絕物種滅絕，即某個物種的完全消失，在地球的歷史上并不罕見。(18)句中if引導(dǎo)條件狀語從句，that we live on為限制性定語從句，修飾先行詞planet。Can a sixth extinction be avoided？Experts say that it is not yet too late，if we take actionnow.(14) This would mean we have to significantly change the way we live(15)．For example，we need to take steps tosave endangered species，including setting up special areaswhere plants and animals can be protected(16)．We need to change how we work and travel by using cleaner，more natural sources of energy，such as wind and solar energy(17)．We also need to improve our farming methods to reduce water，air and land short，if we want to survive，we need to stop destroying the planetthat we live on and start to protect it.(18)(14)句中that引導(dǎo)賓語從句，if we take action now為條件狀語從句。(10)why引導(dǎo)限制性定語從句，修飾先行詞reasons。(6)該句為省略that的賓語從句。(2)that引導(dǎo)限制性定語從句，修飾先行詞species。詞語助讀①entire species整個物種②wipe out徹底毀滅③unusual ；不平常的④in fact事實上⑤the third mass extinction第三次生物大滅絕⑥known as以……而著稱⑦varied ，形形色色的⑧according to根據(jù)⑨volcanic eruptions火山爆發(fā)⑩asteroid n．小行星?the decrease of the oxygen content含氧量下降?global warming全球變暖?be to blame把……歸咎于?die out 消失；絕跡，滅絕?cause for concern令人擔(dān)心的原因?due to natural causes由于自然原因?that is即?human activity人類活動?a long list of reasons很多原因?factory farming工業(yè)化種植overfishing n．過度捕撈negatively affect allother species對所有其他物種都有負(fù)面影響study the issue研究這個問題up to three quarters of多達(dá)四分之三的……depend on依賴be at risk of處于……的危險或威脅中the balance in nature自然平衡have no air to breathe沒有可以呼吸的空氣be unable to survive無法生存take action采取行動take steps to do...采取措施做某事save endangeredspecies拯救瀕危物種set up special areas建立特別保護(hù)區(qū)natural sources of energy天然能源solar energy太陽能in short簡而言之stop destroying the planet停止破壞星球only five black robins left只剩下5只黑知更鳥off the coast of New Zealand離新西蘭海岸不遠(yuǎn)lay eggs下蛋wildlife workers野生動物工作者begin a programme for開始……的計劃hatch vi.amp。2．Although it is not unusual for species to die out naturally，the rate at which this is now happening is cause for concern.雖然物種的自然滅絕并不罕見，但現(xiàn)在滅絕的速度讓人擔(dān)憂。s top investor in wind and solar power.7．The south of the country was worst affected by the drought.8．The number of new students decreased from 210 to 160 this year.9．The UK，uniquely，has not had to face the problem of mass unemployment.10．I truly hope you found this writing enjoyable and informative．Ⅱ.語法填空之派生詞1．She is interested in conservation(conserve)．2．Can we stop using the unrecyclable(recycle) style of lunch boxes?3．Up to two thirds of 14173。 vt. 減少n. 減少；減少的量8．blame vt. 責(zé)怪，指責(zé)9．hatch vi.amp。t throw rubbish everywhere...Section Ⅰ　TOPIC TALK amp。re beating it to death. —Tom McMillan我們花了多年時間來征服自然，而如今又開始把它往死里推。哈曼4．The land to all the people are the essence of the material，and finally，it has been there from the people of the rebate is rubbish these substances. —Walt Whitman土地對人類來說是根本，然而人類給予自然的是垃圾。達(dá)爾文2．Nature is kind of a loving mother，but also a butcher in cold blood. —Victor Hugo自然不僅是位慈愛的母親，還是個冷血的屠夫。 ——查爾斯 ——甘ve been conquering we39。t leave the tap running.*Turn off lights when you leave a room.*Turn off your puter every night.*Wash your clothes，and yourself，in warm or cold water，not hot water.*Dishwashers use as little water as we all do at least 2 of these all the time，we can make a big difference.[探究發(fā)現(xiàn)]1．What is the purpose of people to set up Earth Day?To tell everyone about their worries.2．What should people do when the water keeps running from a tap?People should stop it from running/Stop it from running.3．Besides the five，what else can you do to save our environment?We shouldn39。 vt. 獵取，獵殺3．incredibly adv. 非常地，極端地4．unusual adj. 異常的；不平常的5．mass adj. 大量的6．varied adj. 各種各樣的，形形色色的7．decrease vi.amp。s overkill.3．Whales are still being hunted and killed in the Arctic.4．Many species have been shot to the verge of extinction.5．The government ordered the police out to restore order and peace in the streets.6．China is the world39。