1. 考试   correction   teaching   write   examination   Hint Half-n-half Clue   2. 教学   teaching   teach   study   question   Half-n-half Clue   3. 教   write   question   teach   mark   Half-n-half Clue   4. 问题   homework   teaching   question   correction   Half-n-half Clue   5. 研究   study   read   teaching   examination   Half-n-half Clue   6. 读   correction   answer   read   homework   Half-n-half Clue   7. 写   examination   homework   write   correction   Half-n-half Clue