Last but not least , some difficult courses should be continually studying rather than having long a break time .
Last but not least , some difficult courses should be continually studied rather than having a long break .
Last but not least , some difficult courses should be continually studied rather than having a long break .
모든 문법 오류 수정: Last but not least , some difficult courses should be continually studying rather than having long a break time . 산출: