题目内容

4.
A.revealedB.countsC.responsibleD.release
E.virtuallyF.extentG.annuallyH.extinct
I.extendsJ.monitorK.realized
In the time that records have been kept of bird populations,20percent of all species have gone (41)H.More are likely to follow.In March the (42)D of a large-scale,24-year survey gave one of the clearest pictures yet of the decline of Australian and Asian shorebirds,including the long-distance migrants (候鸟) that are most difficult to (43)J.The results of the survey are awful.
Every October for more than two decades,teams from the University of New South Wales in Australia counted birds from an airplane flown low over 130,000square miles of wetlands in the eastern third of the continent.Their (44)B showed a steady decline,beginning in the mid-1980s.By 2006the number of migratory shorebirds had dropped by 73percent and the number of Australia's resident of shorebirds had fallen by 81percent."The(45)F of the decline took us by surprise,"says evolutionary ecologist Silke Nebel of the University of Western Ontario in London,the lead author of the report.
The survey (46)A that inland wetlands were more important to both resident and migratory birds than had been (47)K,and that wetland loss from damming (筑坝) and the diversion (分散) of river water for irrigation was at least in part (48)C for the shorebird decline in Australia.But wetlands are becoming smaller in countries all along the major flyway that (49)I from eastern Siberia to New Zealand,the study's authors note,so protecting the 8million birds that use the corridor (50)G will require an international solution.

分析 从有记录以来,鸟的种类有百分之二十都已经灭绝了,而且越来越多的鸟类正在消失.

解答 H D J B F A K C I G
41.H 考察名词.根据the decline 可知,鸟的种类正在灭绝.
42.D 考察名词.one of the clearest pictures 暗示填release发行一些图片.
43.J 考察动词.前句提到很多鸟正在消失,包括很难监测到迁徙的候鸟,monitor动词监测.
44.B 考察名词.根据over 130,000square miles of wetlands in the eastern third of the continent说的是鸟的数量.
45.F 考察名词.前句shorebirds had fallen by 81percent下降了百分之81,可见,下降的幅度很大,extent指程度.
46.A考察动词.根据that inland wetlands…可知是揭露的内容,reveal动词揭露.
47.K 考察动词.realize动词意识到,内陆的湿地比我们想的要重要的多.
48.C考察形容词.为…负责be responsible for为固定短语.此处分析鸟数量降低的原因.
49.I 考察动词.湿地的减少从西伯利亚海岸扩展到新西兰,extend动词扩大.
50.G 考察副词.此处用anually副词来修饰use the corridor,每年地.

点评 做短文填词这种题时,要在理解文章整体的基础上,补全所缺的部分.针对这个特点,解答时要注意语境和上下文的联系,同时还要注意文章的写作方法和结构

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41.A.controlB.balanceC.directionD.instruction
42.A.upB.farC.aheadD.away
43.A.turn backB.keep forwardC.ascendD.quit
44.A.reachedB.arrivedC.climbedD.entered
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