[9급 지방직 영어 2018년 3번]

밑줄 친 부분 중 어법상 옳지 않은 것은?
I am writing in response to your request for a reference for Mrs. Ferrer. She has worked as my secretary ① for the last three years and has been an excellent employee. I believe that she meets all the requirements ② mentioned in your job description and indeed exceeds them in many ways. I have never had reason ③ to doubt her complete integrity. I would, therefore, recommend Mrs. Ferrer for the post ④ what you advertise.
영어
정답 ④

출처: 인사혁신처 공개 기출(공공데이터포털, 이용허락 제한 없음)