登录 免费注册
英语 初中 · 九年级 译林版 · 九年级上册 单选题 ★★★★☆ 编号 #10053
The machine ___ these days in the 19th century.
A. is being invented
B. has been invented
C. are invented
D. were invented
章节：动词的语态 · 知识点：现在进行时的被动语态 · 标签：被动语态,语法
登录后可加入错题本 / AI 讲解
🔒

登录后每天可免费查看 5 道完整解析

注册即享每日免费额度，开通会员不限量。

立即登录 / 注册

📎 同类题推荐

#9966 These trees ___ these days in spring.… ★★★★☆ #9972 The house ___ right now every two years.… ★★★★☆ #9978 The meeting ___ at the moment in the hall.… ★★★★☆ #9984 A new bridge ___ at the moment over the river.… ★★★★☆ #9990 The film ___ at the moment on TV.… ★★★★☆