Access to electricity has always been limited for people living in Nuevo Saposoa, a remote village i

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Access to electricity has always been limited for people living in Nuevo Saposoa, a remote village in Peru. However, things went from bad to worse in March 2015 ___1___ a flood damaged the power station in the area. The villagers were ___2___ to turn to kerosene(煤油) lamps, which are not only expensive but also ___3___ because of the poisonous matter they give off.
___4___,the researchers and students at the Universidad de Ingenieriay Tecnologia(UTEC)in Lima,Peru heard about their ___5___ situation and came up with a creative solution. They ___6___ a lamp that can be powered by plants and soil, both of which can be found ___7___ in the Amazonian rain-forests where the village is located. Called Plantaldmparas, the ___8___ draws energy from a plant growing in a wooden box and uses it to ___9___an LED bulb.
While that may sound complicated and even impossible, it is quite ___10___. The waste produced by plants undergoes oxidization(氧化作用)in the soil, which produces electrons(电子). The UTEC team placed electrodes(电极)inside the soil to ___11___ the energy and store it in the lamp's batteries for ___12___ use. The researchers say a single charge can light an LED bulb for two hours-enough ___13___ for people to get their evening chores done. The university ___14___ ten such lamps to Nuevo Saposoa in October 2015. So far, they have been a huge ___15___! Elmer Ramirez, UTEC's professor, believes the plant powered lamps could also help improve the lives of thousands of other ___16___ rainforest communities, 42%of which have no access to ___17___.
This is not the ___18___ time the students and professors of UTEC have come up with a(n)___19___ solution to a problem. In 2014, to deal with Peru's severe ___20___pollution they created a large advertising board that could be used as an air purifier(净化器)as well!
1. A. after  B.though  C.unless D.until
2.A.advised B.taught    C.asked D.forced 
3.A.disappointing  B.inconvenient C.strange D.dangerous
4.A.Fortunately  B.Suddenly C. Certainly D.Usually
5.A.real B.embarrassing C.bad D.unstable
6.A.bought B.designed C.discovered D.repaired
7.A.in detail B.in time C.in harmony D.in abundance
8.A.village B.lamp C.rainforest D.soil
9.A.light up B.make up C.give up D.use up
10.A.widespread B.straightforward C.well-known D.labor-saving
11.A.waste B.save C.produce D.direct
12. A.additional B.free C.regular D.later
13. A.energy B.space C.time D.brightness
14. A.distributed  B.sold C.lent D.returned
15. A.success B.challenge  C.change D.surprise
16. A.nearby B.small C.remote D.ancient
17. A.education B.electricity C.technology D.entertainment
18. A.best B.first C.accurate D.normal
19. A.clever B.simple C.temporary D.immediate
20. A.noise B.water C.air D.vehicle
 .答案:1-5 ADDAC 6-10 BDBAB 11-15 CDCAA 16-20 CBBAC
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