题目内容

18.The old woman who ____ in the deserted house alone for ten years have been settled in a nursing home now.(  )
A.livedB.have livedC.had livedD.has been living

分析 曾在那所废弃的房子里住了十年的那对老夫妻现在已经被安顿在养老院了.

解答 答案:A
根据句意可知,由于那对老夫妻现在已经被安顿在养老院了,不在那所废弃的房子里住了,因此"住在废弃的房子里"是发生在过去的动作,句中的时间状语now对应的是过去;故应使用一般过去时;B.现在完成时,表示发生在过去并持续到了现在的动作;C.过去完成时,表示发生在过去某时间之前的动作;D.现在完成进行时,表示从过去某时开始一直持续到现在的动作,并且还将持续下去;B.C.D都不符合句意;故选A

点评 本题考查了一般过去时的用法.在做类似的时态题,首先应根据句意提示或句中的时间状语,正确判断出动作发生的时间;其次应熟练掌握各时态所表达的意义用法及它们相互之间的用法区别.

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4.Europe on Thursday launched the first satellite of its Copernicus Earth observation project that will supply valuable images in the event of natural disasters or even a plane crash.
     The Sentinel-la satellite,which was sent into Earth's orbit from Europe's spaceport in French Guiana9 will be used to monitor sea ice,oil spills and land use and to respond to emergencies such as floods and earthquakes.
The Copernicus proiect,for which the European Union and the-European Space Agency (ESA) have committed funding of around 8.4 billion euros (_$_11.5 billion) until 2020,is described by the _ESA as the most ambitious earth observation program  to date.
"The big step forward is that we can now cover every place on Earth every three to six days,"Volker Liebig,director of ESA's Earth Observation program,said ahead of the launch."If you want to use images for disaster management support or to find a plane,then you want the images to be as fresh as possible."But he cautioned you would first need to know roughly where a plane had crashed,which is not the case with the missing Malaysian Airlines jet.
    Copernicus also offers new business opportunities.Images can be downloaded free of charge,meaning companies can then use them to help deliver data to farmers on soil conditions or pest infestation,help oil companies decide where to drill new wells or make it easier for insurers to assess the risk of costly floods and fires.
     Sentinel-la,which will operate with a second satellite,Sentinel-1b,to be launched next year,has high-tech instrurnents that will allow it to record radar images of Earth's surface,even when the skies are cloudy or dark.As part of the Copernicus program,there will be 17 launches over the next decade.
61.For what purpose was the Sentinel-la satellite sent up into space?A
A.To improve observation of the earth.
B.To search for some missing planes.
C.To download free valuable images.
D.To predict floods and earthquakes.
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A.It can cover every place on Earth at the same time.
B.It makes a profit by offering downloaded images.
C.It is financed by the European Union and ESA.
D:It has put two satellites into Earth's orbit successfully.
63.According to Volker Liebig,the Sentine-la satelliteB.
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B.has advanced but limited functions
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D.doesn't work on cloudy days or at night
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B.By calculating the loss of costly floods.
C.By drilling oil wells in proper places.
D.By controlling the risk of potential fires.
65.What does the last paragraph mainly tell us about the Sentinel-1a satellite?D
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