E
练习本；
练习本；
第三人称复数：exercise books
网络解释
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.
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