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TASK 7. (0–5)
Read the text. For questions 7.1.–7.5., choose the word or phrase which fits best in each gap. Circle the appropriate letter (A, B, C or D).
POWER-GENERATING TILES
Would you believe that while people were making their way to attend the Olympics in London in 2012, they were also producing renewable energy? And as a result, they 7.1. _____ to a breakthrough in renewable power.
Around one million or so visitors alighted at West Ham underground station to get to the Games. Access to the Olympic Park was via a tiled walkway. Using a hybrid technology that 7.2. _____ kinetic energy into electricity, the walkway's lights were powered by a uniquely original source: footsteps. Laurence Kemball-Cook, 7.3. _____ behind the technology, dreamt up the idea of turning footsteps into power when he worked at Loughborough University.
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The young inventor calls his creation "footfall harvesting". How does it work? The tile surface flexes about five millimetres 7.4. _____, thus creating kinetic energy that is then used to produce an average of six watts per footstep. During the two weeks of the Games, the tiles generated 20 kilowatt-hours or 72 million joules, which provided 7.5. _____ energy to keep the walkway lights illuminated at full power through the night, and at half power during the day, with plenty of back-up energy to spare. Kemball-Cook sees renewable energy technology as a potential alternative to solar, which is difficult to use indoors or in built-up urban areas.
Adapted from: www.theguardian.com
7.1. A. would rather contribute
B. had better contribute
C. may have contributed
D. used to be contributed
7.2. A. applies
B. converts
C. generates
D. discloses
7.3. A. the heads
B. the minds
C. the wits
D. the brains
7.4. A. when stepped on
B. to being stepped on
C. having stepped on
D. while stepping on
7.5. A. unnecessary
B. extended
C. foremost
D. sufficient
7.1. C
7.2. B
7.3. D
7.4. A
7.5. D
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