含情态动词的被动语态 — 英语词汇题
题目
根据句意及首字母提示补全单词，注意使用含情态动词的被动语态。1. Students should not be a______ to eat in the library. 2. Teenagers should be e______ to develop good study habits by their parents. 3. These rules must be o______ by all the students in our school.（遵守）