2. 外语
  3. The problem is believed______at the meeting two days ago.

The problem is believed______at the meeting two days ago.

admin2013-06-19  51
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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