1. [geng;geng] [zheng;zheng]   correction   study   question   read   Hint Half-n-half Clue   2. [jiao;jiao] xue   answer   question   teaching   teach   Half-n-half Clue   3. [dou;du]   answer   read   learn   write   Half-n-half Clue   4. [jiao;jiao]   teaching   write   answer   teach   Half-n-half Clue   5. [jiao;jiao] xun   study   learn   teach   lesson   Half-n-half Clue   6. biao ji   correction   mark   answer   lesson   Half-n-half Clue   7. wen ti   question   teach   write   teaching   Half-n-half Clue