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29.What did the researchers do for their study?A.They equipped 41 sharks with cameras.B.They created artificial reefs for sharks.C.They dived into the sea to watch sharks.D.They employed positioning technology.30.How do sharks benefit from their social groups according to David Shiffman?A.By sharing food with each other.B.By cooperating to solve problems.C.By following group members'examples.D.By growing stronger through competition.31.What is the best title for the text?A.Sharks Are Very Lonely AnimalsB.Feel Afraid of Sharks?Calm DownC Everyone Needs Friends-Even Sharks D.A Large or Small Group:Which Is Better?DWhen we think about the big carbon problems we have to deal with,paper isn't the firstthing that comes to mind.After all,we think it costs less energy and a lot of it is recycledthese days.However,it turns out that we are wrong.The problem is that to make paper,.you need virgin(未使用过的)wood or recycled material,and it then takes a lot of energy to dry it out and turn it into paper,thus causing carbon emissions()The non-governmental organization Environmental Paper Network's Luisa Colasimone saidthat making a ton of paper and a ton of steel used the same amount of energy.Adrian Hiel andDave Keating,journalists working in Brussels,reported,"Average energy costs are around16%of production costs and can be as high as 30."Colasimone said,"The vast majority of paper products are short-lived.They are thrownaway and their carbon ends up in the atmosphere within two to three years."Also,a recent study from the University College London(UCL)has found that recycledpaper may be less environmentally-friendly than virgin paper because it is made with electricityand fossil fuels."They found that if all wastepaper was recycled,carbon emissions couldincrease by 10%,as recycling paper tends to rely more on fossil fuels than making newpaper,"lead author Dr.Stijn van Ewijk said in a press release."Our study shows thatrecycling is not a guaranteed way to address climate change.Recycling of paper may not behelpful unless it is powered by renewable(可再生的)energy.”The researchers reported that paper accounted for 1.3%of global greenhouse gasemissions in 2012.This rate-1.3%-is a stunning number,bigger than the emiseions fromAustralia or Brazil.About a third of these emissions came from the disposr in场landfills.Researchers said that in coming years,the use of paper would likely rise with theway om plastics leading to inereased demand for paper packaging.32.On what does Luisa Colasimone agree with Adrian Hiel and Dave Keating?A.Recycled material is bad for paper.B.Recycling of paper is really helpful.C Paper making requires much energy.D.The paper-making process proves simple.33.What does the UCL study suggest about recycling of paper?A.It results in the increasing use of plastics.B.It is powered by renewable energy.C.It is the key to fighting climate change.D.n may cause more carbon emissions.4.What does the underined ordin the paragrah probablymean?A.Normal.B.Shocking.C.Small.D.Relaxing.35.What is the text mainly about?A_Carbon problems with paper.B.Emissions from paper making.C.Increasing paper consumption.D.Energy waste in paper recycling.【高三英语试卷第5页（共8页）】223472D
