单选题 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

【正确答案】 C
【答案解析】[解析] 考查虚拟语气。句意：饭店管理部门恳请客人晚上11点以后不要打开收音机。动词request所接从句要用虚拟语气，其结构为“should+动词原形”，should可省略。且此处表示被动，故选C。