This problem is said three times. A. having discussedB. to have been discussedC. having b

问题补充：

This problem is said three times.

A. having discussed

B. to have been discussed

C. having been discussed

D. to have discussed

答案：

A. having discussed

(答案→)B. to have been discussed

C. having been discussed

D. to have discussed

解析：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。