His room _____ by him when I entered the room.
A. was being cleaned
B. was being cleaning
C. was cleaned
D. has been cleaned
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The question asked by him is hard _____ .
A. to be answered
B. to answer
C. to be answering
D. for answer
英语的语态一般有_______。
A. 主动语态
B. 被动语态
C. 完成时态
D. 将来时态
英语中所有的动词都有被动语态。
A. 对
B. 错
被动语态的时态变化只改变助动词be的形式。
A. 对
B. 错