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He has to finish his project by the end of this week. "그는 이번 주 끝까지 프로젝트를 끝내야 해요." You don't have to bring any gifts to the party. "당신은 파티에 선물을 가져올 필요 없어요." She has to return the library books by tomorrow. "그녀는 내일까지 도서관 책을 반납해야 합니다." They don't have to wait for us if they're in a hurry. "그들은 서둘러야 한다면 우리를 기다릴 필요가 없어요." We had to call a plumber because of the leaking faucet. "누수하는 수도꼭지 때문에 우리는 배관공을..