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31.Why did Palese and Acquarica merge in 2019?A.To create wider territory.B.To gain more funds.C.To attract more investment.D.To follow Italian law.DTrees naturally absorbed COz through photosynthesis(光合作用)，releasing oxygen,storing carbonfor decades,or even centuries.Biotechnology firm Living Carbon says lab trials of its genetically-changedpoplar trees take up more carbon and grow 1.5 times faster than unchanged ones.The team added genesfrom pumpkin to the poplars,which makes their photosynthesis more efficient,turning more carbondioxide into sugars to create wood biomass(生物量).Though the firm's lab results are promising,biologists warn that high growth rates are not guaranteedin the wild as the poplars compete for sunlight with other plants and trees.Genetically-modified (GM)supertrees may also need much watering and fertilizer to keep their rapid growth.The results are important given the rate of climate change and climbing CO2 levels in the atmosphere.But critics say there are risks to planting GM trees in the wild if they reproduce with other trees,ornegatively affect other plant and animal species.Living Carbon says trees are a hybrid that can onlyreproduce from cuttings,so cannot cross-pollinate()with wild trees.If the field trials are successful then it will still take time to get approval from the government.Onesixth,around 135,tree species in the US may face extinction due to climate change,foreign insect species,or disease.And even though field trials of a GM chestnut tree have shown its ability to resist some foreigndisease that wiped out billions of American chestnuts,it still has not been approved for planting.If CO2 storage is the aim then there are species that already fit the bill.California's Redwood treesstore more carbon than any other species.Redwoods are not suitable for every forestry plot,so creatingclimate adaptable trees through reproducing programs that fit into local ecosystems is the goal.But in therush to fix the climate crisis,increase CO2 uptake,and carbon storage,GM supertrees may be part of thatsolution.32.How was the poplars'carbon capacity improved?A.By absorbing carbon dioxideB.By producing wood biomassC.By speeding up photosynthesisD.By engineering their genes.33.What is the potential disadvantage of the GM trees?A.They reproduced with other plantsB.It is impossible to get approval.C.It is hard to grow fast in the wild.D.They are not competitive enough.34.What does the underlined phrase "fit the bill"in the last paragraph mean?A.Be unusual.B.Be available.C.Be unsuitable.D.Be valuable.35.What can be the best title for the text?A.Supertrees Could be Climate Fix.B.Supertrees Take up More Carbon.C.Change of Genes Reduce CO2.D.Changes of Genes Brings Efficiency.第二节（共5小题；每小题2.5分，满分12.5分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。Is your glass of milk half-full or half-empty?This saying is often used to test people's outlook in asituation;do they focus on the positives (a half-full glass)or the negatives(a half-empty one)?36-and it's known to boost your well-being.Why is thinking positively good for you?Research shows that people who are optimistic and think positively tend to experience less stress and高二英语试题第5页（共8页）