The science of the library is sometimes broken by a sudden cough or the sound of pages .A

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A. turning
B. turned
(答案→)C. being turned
D. having turned
解析：C 本题考查动名词复合结构。句意：图书馆的寂静有时被突然的咳嗽声或者翻书的声音打断。pages being turned是动名词的复合结构作介词of的宾语，turn和pages之间是被动关系，应用动名词的被动形式。