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medical technology has also benefited from spin-offs of space research. some of the systems that were used to track the life signs of astronauts in space have evolved into the high-tech devices used to monitor intensive care patients in hospitals. and much of the equipment designed to be used aboard spacecraft has been adapted for use aboard ambulances. but perhaps most important are the tiny but highly effective pumps that were developed for spacecraft engines. these may eventually be adapted to provide smaller alternatives to the heart pumps currently used by heart patients. so, the next time you want to feel like an astronaut, just take a look around you. put on your eyeglasses, set your watch, and then take a walk in your sports shoes to the convenience store. all of these simple acts have been affected by spin-offs of the same space technology that has sent astronauts to the moon and beyond.

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from high-tech appliances for patients to the items or ( a ) such as shoes and glasses for our daily lives, we can find that we have made good ( b ) of many by-products of space technology getting to the other planet.

(a) (b)
①commodities ---------------------------------- look
②necessities ---------------------------------- use
③ingredients ----------------------------------- useful
④solutions ------------------------------------- exploit
⑤ merchandise --------------------------------- useless

답은 ③ 이라는데 석연치 않네요

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