This problem is said _____ three times. ...

This problem is said _____ three times.

A．having discussed	B．to have been discussed
C．having been discussed	D．to have discussed

B 【解析】试题分析：考查句型：Sb/Sth is said to have done,某人某物据说已经做了…，因为problem和discuss是被动关系，用不定式完成式的被动，句意是：这个问题据说已经讨论了三次了。选B。考点：考查固定句型

考点分析：

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