植物部位词汇：root, stem, leaf, flower — 英语填空题
题目
看单词，选一选，把 plant 各部分名称的字母写在横线上。A plant has four parts. The part under the ground is the ___. The long green part standing up is the ___. The flat green part on it is the ___. The pretty red part on top is the ___.（root / stem / leaf / flower）