英语 七年级 选择题 较难 ★ 精品 must/mustn't表达用电规则 — 英语选择题 沪教版·英语(初中) Unit 6 Electricity everywhere AI 三重审校通过 题目 Before cleaning a desk lamp, you ___ turn it off and unplug it. You ___ pull the plug out by its cord. Which pair is correct? A. must; must B. must; mustn't C. mustn't; must D. mustn't; mustn't 登录后查看答案与解析 用此考点生成试卷 本单元全部练习题 更多英语选择题