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It is politely requested by the hotel management that radios

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It is politely requested by the hotel management that radios ___________after 11 o'clock at night
A.were not played
B.not to play
C.not be played
D.did not play
It is politely requested by the hotel management that radios
全句意思是:“旅馆管理部门恳请客人晚上11点后不要打开收音机”.句中的谓语动词request(请求)所引出的从句应当用虚拟语气,即动词原形或“should+动词原形”.本句的主语从句中,主语radio是谓语动词play 的客体,谓语应当用被动语态.所以,答案是C) not be played.在上述这类句子中不能用动词过去时形式表示虚拟语气,所以A)不正确.选项B) not to play是动词带to的不定式,不能在句中作谓语.选项D)did not play也是动词play的过去时形式,同样不能在本句中作为虚拟语气来使用.而且,它是主动语态形式,而本题要用被动语态.