The noise of desks _______ could be heard out in the street.
The noise of desks _______ could be heard out in the street.
A、opened and closed
B、to be opened and closed
C、being opened and closed
D、having been opened and closed
【正确答案】：C
【题目解析】：being opened and closed 是分词短语作后置定语的，修饰desks
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