다음 중 괄호에 들어갈 말로 가장 적절한 것은?
Animal conservationists argue that removing some endangered species from environments where they are at risk is necessary if they ( ) in the long term.
① are to be survived ② survive ③ are surviving ④ are to survive
Animal conservationists argue that removing some endangered species from environments where they are at risk is necessary if they ( ) in the long term.
① are to be survived ② survive ③ are surviving ④ are to survive
2
답4 to부정사의 형용사적 용법