问题描述：
The silence of the library was sometimes broken by an occasional cough or by the
sound of pages _______.
A.turned B.having turned
C.to be turned D.being turned为什么填being turned?这里面不是非谓语动词作定语吗?求讲解,
sound of pages _______.
A.turned B.having turned
C.to be turned D.being turned为什么填being turned?这里面不是非谓语动词作定语吗?求讲解,
问题解答：
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