英语 高三 选择题 较难 ★ 精品 时代变迁话题词汇 — 英语选择题 外研社版·英语(高中) Unit 3 Times change! AI 三重审校通过 题目 After the town’s telephone exchange replaced its hand-operated switchboard with a digital system, the old equipment was no longer in use. It had become _____. A. obsolete B. temporary C. convenient D. widespread 登录后查看答案与解析 用此考点生成试卷 更多英语选择题