摘要：At the beginning of class, the noise of desks could be heard outside the classroom. A. opened and closed B. to be opened and closed C. being opened and closed D. to open and close 解析:考虑到这句话体现的特定语境:桌子只有正在被一开一关声音才可能被外面的人听到.所以现在分词的被动式做定语.
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At the beginning of class, the noise of desks _____ could be heard outside the classroom.
A. opened and closed B. to be opened and closed
C. being opened and closed D. to open and close
查看习题详情和答案>>At the beginning of class, the noise of desks __________ could be heard outside the classroom.
A. opened and closed B. to be opened and closed
C. being opened and closed D. to open and close
查看习题详情和答案>>At the beginning of class, the noise of desks ______ could be heard outside the classroom.
A. opened and closed B. to be opened and closed
C. being opened and closed D. to open and close
查看习题详情和答案>>