1．Across countryside，non-food crops are growing alongside wheat．Some are used in new alternatives to plastics and other materials，but others will simply be burned．
Burning crops is becoming more popular because it is good for the planet．Doing so is also cheaper than burning fossil fuels．As more land is devoted to non-food crop production，the economics of crops for fuel are likely to become even more favorable．
Humans have been burning such biomass-organic materials from plants or animals-since they discovered fire．But that burning fossil fuels could have catastrophic consequences has brought biomass back into fashion．
Even allowing for emissions（排放） of carbon dioxide from fuel used in planting，harvesting，processing and transporting biomass fuel，replacing fossil fuel with biomass can typically reduce greenhouse gas emissions by more than 90per cent．
Power stations around the world are experimenting with forms of biomass to add to their coal or oil，with encouraging results．Indeed，power companies could profit by turning to biomass，especially when the subsidies（補(bǔ)助） many governments offer for using renewable energy are taken into account．
Farmers can benefit from growing biomass．In Europe，the reduction of subsidies for certain crops is exposing farmers to market forces．Instead of being paid for whatever they produce，farmers must seek a clear demand for their product．Many believe that the demand for alternatives to fossil fuels could be just such a driver．
But while biomass offers a variety of potential alternatives，the world's infrastructure（基礎(chǔ)設(shè)施） has developed around burning fossil fuels to such a stage that switching to biomass involves a change in conception that many companies have not accepted．
Also，there are problems with using biomass．Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment，few are built to run on biomass alone．Burning some forms of biomass also causes environmental problems．Oils and waste can be smelly，while wood produces smoke unless burned properly．
The supply chains for fossil fuels are set up well，but those for biomass are just the beginning．Sources of supply for biomass rely on farm production and can therefore be less reliable．They are necessarily limited and it wouldn't make sense to turn a very large amount of valuable agricultural land away from food crops．But as the world adjusts to the need to control greenhouse gas emissions，these problems may receive more attention．

67．What do we know about biomass？C
A．It is a useful way of burning crops．
B．It is a new alternative to be used widely．
C．It is plant and animal matter used to provide power．
D．It is a popular approach to fighting against pollution．
68．What are the advantages of using biomass？D
a．It gives off less greenhouse gases．
b．It helps farmers receive subsidies for what they produce．
c．It has met the clear demand for energy．
d．It has brought subsidies for some power companies．
e．It is cheaper than burning fossil fuels．
A．a(chǎn)，b，c   B．b，c，d    C．c，d，e   D．d，e，a
69．For coal-fired power stations，C．
A．more effective ways to use biomass have been tried
B．using renewable energy has become their daily task
C．burning biomass alone would require considerable changes
D．setting up dependable supply channels needs governments'support
70．What is the author's attitude towards biomass fuels？A
A．Objective．B．Sceptical．C．Disapproving．D．Defensive．

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講述了使用生物質(zhì)能的各種好處及其生物質(zhì)現(xiàn)在并沒(méi)有得到廣泛運(yùn)用的原因，同時(shí)作者相信在不久的將來(lái)肯定能夠解決這些問(wèn)題，生物質(zhì)能也會(huì)被廣泛的運(yùn)用．

解答 67．C．細(xì)節(jié)理解題．根據(jù)文章第二段Humans have been burning such biomass-organic materials from plants or animals，人類從植物或動(dòng)物身上燃燒這樣的生物質(zhì)能，可知，生物質(zhì)能是一種通過(guò)燃燒植物或是動(dòng)物來(lái)獲取能量的東西，故選B．
68．D．細(xì)節(jié)理解題．根據(jù)文章第一段Doing so is also cheaper than burning fossil fuels．；biomass can typically reduce greenhouse gas emissions by more than 90 percent．；Farmers can benefit from growing biomass．In Europe，the reduction of subsidies for certain crops is exposing farmers to market forces可知生物質(zhì)能的好處是價(jià)格便宜，排放溫室氣體少，能夠使農(nóng)民獲得政府的補(bǔ)助，故選D．
69．C．推理判斷題．根據(jù)文章Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment，few are built to run on biomass alone，可知電廠可以使用一部分生物質(zhì)能，但基本不存在完全依賴生物質(zhì)能的電廠，因此推測(cè)依靠煤發(fā)電的電廠如果用生物質(zhì)能的話需要相當(dāng)大的改變，故選C．
70．A．推理判斷題．從全文來(lái)看，作者并沒(méi)有推崇也沒(méi)有反對(duì)這種能源，只是以非�？陀^的態(tài)度說(shuō)明了它的使用情況，故選A．

點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．

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