问题补充：
I suggest that the person put into prison.
A. refer to
B. referred to was
C. referred to be
D. referring to should be
答案：
A. refer to
B. referred to was
(答案→)C. referred to be
D. referring to should be
解析：非谓语动词作后置定语，the person与refer to 为被动关系，故用过去分词，suggest后面接宾语从句，从句用虚拟语气，结构为should +动词原形，should 可省略，根据句意，the person 与put into prison 为被动关系，
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