行为规范类词汇与短语 — 英语词汇题

根据句意和首字母提示补全单词（每空一词），使句子表达正确的行为规范。1. Please w____ in line when you wait for the school bus. Don't push others. 2. It's not polite to s____ loudly in the library. We should keep quiet. 3. Don't p____ flowers in the park. They are for everyone to enjoy.