词汇：playground及安全活动类单词 — 英语词汇题
题目
根据首字母和中文提示，补全下列与操场安全活动相关的单词。1. On the p_______ (操场), we should play safely. 2. Don't r_______ (跑) down the stairs. 3. It's dangerous (危险的) to f_______ (打架) with your friends. 4. We must o_______ (遵守) the school safety rules.