At the routine office meeting, the headmaster insisted that the problems paid special att

At the routine office meeting, the headmaster insisted that the problems paid special attention to.
A. referred to being
B. referred to be
C. refer to being
D. refer to be

A. referred to being(答案→)B. referred to beC. refer to beingD. refer to be解析：这题考查过去分词作定语和虚拟语气的用法：referred to是定语修饰the problems，表示“被提到的问题’,又因为insist表示”坚持要求“时，从句用should do，should可以省略。选B。

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