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【提分必做】高中英语 Unit 22 Environmental Protection Section Ⅴ 学业分层测评 北师大版选修8

Unit 22 Environmental Protection Section Ⅴ Ⅰ.单句语法填空 1.Not only ________ I know her, but I was her best friend. 2.He said that the Christmas tree ________(buy) soon. 3.You can easily get access ________ the humorous old man. 4.He fixed his attention on ________(listen) to the morning news. 5.At no time ________ the country been more prosperous than at present. 【答案】 1.did 2.would be bought 3.to 4.listening 5.has Ⅱ.单句改错 1.The naughty boy was made do his homework. _________________________________________________________________ 2.Not only the students but also the teacher like holidays. _________________________________________________________________ 3.The only access of the city is across the bridge. _________________________________________________________________ 4.My new house is painted now. _________________________________________________________________ 5.These problems should have solved months ago. _________________________________________________________________ 【答案】 1.do 前加 to 2.like 改为 likes 后加 been Ⅲ.阅读理解 Alaska's Arctic lakes now freeze later and melt earlier in the year than in 1950, leaving them easy to suffer water loss from evaporation(蒸发)and possibly adding to local warming, a new study finds.The winter ice season near Barrow, Alaska, is shorter than in 1950, researchers reported Jan.30 in the journal The Cryosphere. Lake ice is also thinner each winter.The scientists surveyed 402 lakes on the North Slope,where permafrost (permanently frozen ground)and shallow lakes dominate the area.In 2011, the lake ice was 38 percent thinner than in 1950, and 22 percent fewer lakes froze through to their bottoms. “When we saw the actual numbers we were shocked at how dramatic the change has been,” lead study author Cristina Surdu, of the University of Waterloo in Canada, said in a statement.Surdu and her co?authors analyzed the changes in lake?ice 1 3.of 改为 to 4.is 后加 being 5.have thickness and ice cover with satellite images and climate model simulations(satellite images are only available from 1991). The climate models suggest the Arctic lakes froze almost six days later and broke up about 18 days earlier in the winter of 2011 compared with the winter of 1950.“The changes in ice and the shortened winter affect Northern communities that depend on ice roads to transport goods,”Surdu said.For example, every winter, oil companies build roads over frozen lakes to carry supplies to Prudhoe Bay. “The dramatic changes in lake ice may also cont

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