1. 家庭作业   correction   mark   learn   homework   Hint Half-n-half Clue   2. 读   study   write   read   teach   Half-n-half Clue   3. 写   correction   write   mark   question   Half-n-half Clue   4. 教训   learn   correction   study   lesson   Half-n-half Clue   5. 研究   examination   study   read   write   Half-n-half Clue   6. 答复   examination   answer   homework   write   Half-n-half Clue   7. 学会   learn   question   correction   teaching   Half-n-half Clue