1. 教訓   teaching   lesson   answer   study   Hint Half-n-half Clue   2. 教   read   homework   teach   learn   Half-n-half Clue   3. 學會   read   learn   write   answer   Half-n-half Clue   4. 答復   answer   teach   correction   write   Half-n-half Clue   5. 標記   teach   answer   mark   lesson   Half-n-half Clue   6. 更正   write   learn   read   correction   Half-n-half Clue   7. 研究   teaching   homework   mark   study   Half-n-half Clue