I should not need to remind each and every citizen of Rapture that free enterprise is the foundation upon which our society has been established.
1. free enterprise is the foundation upon에서 upon은 Rapture를 목적어로 가지나요?
2. which our society has been established절은 무엇의 목적어가 될까요?
3. 문장 전체를 자세히 해석해주세요.
4. 문법적인 설명을 같이해주세요.
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