Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
국가사는 우리 민족의 정체성을 이해하는 데 중요하다.gukgasa-neun uri minjok-ui jeongtaeseong-eul ihaehaneun de jungyohada.National history is important for understanding the identity of our nation.