英语 高三 选择题 标准 被动语态描述科技过程 — 英语选择题 沪教版·英语(高中) Unit 4 Technology AI 三重审校通过 题目 The instructions ___ (must follow) step by step when the 3-D printer is programmed, or the model may come out wrongly shaped. A. must follow B. must be followed C. must be following D. must have followed 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