제가 RC 중급책으로 공부하다 해결이 안되서 ㅠ 질문올려요
1. The human resources office chose to hold the investors' convention at the hotel ------- had offered the best group rate.
2. Gleeson Events provides a variety of services ------------ assist companies in organizing ceremonies and seminars.
3. Rhe interiors of the offices were handled by Romsine Design, ------------- has also done previous work at the company's headquarters.
4. The exhibition, ----------- will open in September, is being arranged by the president of the city's art council.
저는 저 밑줄에 모두 what을 썼습니다.
해석했을 때 ~하는것 정도로 이해를 했고 뒤에 불완전한 절이 와서 what을 써도 된다고 생각했습니다.
각각 답은 that, that, which, which 입니다.
왜 what이 정답이 될 수 없고, that과 which가 답이여야 하는 이유를 알려주세요 ㅠㅠㅠㅠㅠ