◎ 题干
The room _______, but now it's dirty again.

[     ]

A. was cleaned
B. is cleaned
C. cleaned
D. cleans
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“The room _____, but now it's dirty again. [ ]A. was cleaned B. is cleaned C. cleaned D. cleans …”主要考查了你对  【被动语态】【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。