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英语 高中 · 高二 译林版 · 选择性必修第一册 单选题 ★★★★☆ 编号 #10080
The classroom ___ since last year every day.
A. must be cleaned
B. clean
C. are cleaned
D. has been cleaned
章节：动词的语态 · 知识点：现在完成时的被动语态 · 标签：被动语态,语法
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