the witness suggested that the cheat ( )in prison.A.referred to be put.B.refer to be put.是A,不是suggest that sb (should) do sth吗,B为什么错

the witness suggested that the cheat ( )in prison.A.referred to be put.B.refer to be put.是A,不是suggest that sb (should) do sth吗,B为什么错
the witness suggested that the cheat ( )in prison.A.referred to be put.B.refer to be put.
是A,不是suggest that sb (should) do sth吗,B为什么错

the witness suggested that the cheat ( )in prison.A.referred to be put.B.refer to be put.是A,不是suggest that sb (should) do sth吗,B为什么错
你在线吗?
答案正确.
你被插入的-ed 短语干扰了,找不到句子的主干了.
给你解剖一下,抽去...referred to.
The witness suggested that the cheat （should) be put in prison.
其中的 the cheat (who was) referred to. 所（被）提到的/所（被）指认的 骗子
再合起来：
The witness suggested that the cheat (who was) referred to (should) be put in prison.
证人建议要让（他）所指认的那个骗子坐牢.

referred to 前面省略who was，表示被动。suggest that sb (should) do sth中的should do sth在此题目中体现为be put in prison。翻译：目击者认为被提到的骗子应该被送进监牢。