1. 圖書館   blackboard   library   grade   crayon   Hint Half-n-half Clue   2. 黑板   crayon   blackboard   classmate   ruler   Half-n-half Clue   3. 筆記本   chalk   ruler   desk   notebook   Half-n-half Clue   4. 統治者   blackboard   pencil   pen   ruler   Half-n-half Clue   5. 同學   eraser   classmate   student   satchel   Half-n-half Clue   6. 鉛筆刀   desk   pencil sharpener   chalk   library   Half-n-half Clue   7. 橡皮擦   teacher   pen   chair   eraser   Half-n-half Clue