질문
문제 이해
10. 다음 글의 밑줄 친 부분 중, 어법상 틀린 것은?
In Philadelphia, planners have been experimenting with a new way of slowing drivers down: painted 3-D triangles that look like speed bumps. At one quarter of the cost of physical bumps, the devices also have the advantage of not tearing up emergency vehicle axles as they speed over them. A month of investigation on a half-mile stretch of road found that driver speeds fell from an average of 38 miles per hour to 23 miles per hour. While this drop is impressive, the effect may be temporary as drivers, particularly those who regularly travel that route, to learn which bumps □□□□□.
풀이
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유사 문제와 풀이
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