1. 更正   teaching   read   correction   study   Hint Half-n-half Clue   2. 研究   read   write   study   mark   Half-n-half Clue   3. 标记   examination   question   mark   write   Half-n-half Clue   4. 教训   answer   question   learn   lesson   Half-n-half Clue   5. 写   write   teach   answer   lesson   Half-n-half Clue   6. 问题   answer   write   question   homework   Half-n-half Clue   7. 考试   examination   mark   learn   study   Half-n-half Clue