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Sydney
Friday, August 14, 2020

You will hear a recording. Type the missing words in each blank.

 

Chemists there have developed a battery that runs on sugar, from soft drinks to (1) ……………… . Living things have been using sugar for the fuel over a billion years. Now scientists have taken a tip from biology and (2) ……………………….. batteries that contain enzymes that convert sugar into electricity. The researchers used their battery, which was about the size of a postage stamp, to run a (3) ………………………… calculator and they (4) ………………………. the thing using sweetened drink mixes, tree sap, even the plain old sugar water. Soda works too, but it has to be flat, because (5) ………………………… doesn’t help. In addition to providing juice for cell phones, mp3 players and, of course, calculators, sugar batteries could allow soldiers to charge their electronics on the (6) …………………………., a possibility that interested the Defense Department enough to (7) ……………………………. the studies.

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