1. 练习簿：exercise book paper 练习本用纸 | exercise book 练习簿 | exercise respirator 负荷呼吸器

2. 练习本：satchel 书包 | exercise book 练习本 | blotting paper 吸墨纸

3. 器具用品：植物部位:branch, trunk, stalk | 器具用品:exercise book, sketch-book, rope, hoop | 形容词: tired, full ,afraid ,angry, strong, brave ,sharp ,large

4. 练习册：20 教科书 textbook | 21 练习册 exercise book | 22 黑板blackboard