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
학생들은 학업성취연령에 도달하기 위해 열심히 공부해야 합니다.haksaengdeul-eun hak-eobseongchwiyeonryeong-e dotalhagi wihae yeolsimhi gongbuhaya hamnida.Students must study hard to reach the achievement age.