情态动词表义务与禁止 — 英语词汇题
题目
根据句意和中文提示，用正确的情态动词（must / mustn't）补全句子。每空一词。1. You ______ (必须) keep quiet in the library. 2. You ______ (禁止) smoke in public places. 3. Drivers ______ (必须) stop at red lights. 4. We ______ (禁止) park cars here. It's against the law.