On AIDS Day, the minister of Health Department demanded that the problems paid special at

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A. referred to being
(答案→)B. referred to be
C. refer to being
D. refer to be
解析：考查分词做定语和虚拟语气。动词demand后面的宾语从句使用“should+动词原形”构成的虚拟语气，should可以省略，动词短语refer to与名词the problems之间构成被动的关系，故使用过去分词的形式在句中做定语修饰。句意在世界艾滋病日，卫生部的大臣要求被提到的问题要被注意到。故B正确。本题的be前面省略了should。