다음 글의 밑줄 친 부분 중, 어법상 가장 틀린 것은?Before yo… | [법원직 9급 영어] 25년 1회차 기출문제 상세 페이지

다음 글의 밑줄 친 부분 중, 어법상 가장 틀린 것은?
Before you can understand what’s wrong with your joints, you need to understand what a joint is and how it works. Any place in the body ① where two bones meet is called a joint such as the ball and socket hip joint, or the hinge joint at the elbow or knee. Sometimes the bones actually join together; your skull is an example of an area with ② fused bones. But in the joints ③ what can develop arthritis, the bones don’t actually touch. A small amount of space exists between the two bone ends. The space between the ends of the bones keeps them from grinding against each other and ④ wearing each other down.

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