The problem is believed______at the meeting two days ago.A、to have discussedB、t

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问题 The problem is believed______at the meeting two days ago.

选项 A、to have discussed
B、to have been discussed
C、being discussed
D、having been discussed

答案 B

解析不定式。跟在believe，think，consider等词后面作主语补足语的成分一般为动词不定式；且the pmblem和discuss是被动关系。

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