다음 글의 밑줄 친 부분 중 어법상 옳지 않은 것은?
Younger students ① who participated in the survey ② sponsored by a weekly magazine turned out ③ to be less concerned about the serious problems of homeless people ④ as the older students were.
- ①who
- ②sponsored
- ③to be
- ④as
정답 ④
출처: 인사혁신처 공개 기출(공공데이터포털, 이용허락 제한 없음)