英语 九年级 选择题 较难 被动语态描述发明创造 — 英语选择题 沪外教版·英语 Unit 2 Science and Discoveries AI 三重审校通过 题目 A new kind of solar lamp ___ by a student in 2019, and three improved versions ___ the following year. A. invented; produced B. was invented; were produced C. were invented; was produced D. is invented; are produced 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