It is requested by the manager of the hotel that radios _________ after 11 o’clock at night．A.were not playedB.not be playedC.not to playD.did not play
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B解析题意是“旅馆老板恳请客人晚上11点后不要打开收音机”。谓语动词request后的宾语从句应当用虚拟语气，即“should+动词原形”，should可以省略。从句radio和play是动宾关系，谓语动词用被动语态，排除C和D项。