He seemed to me at the party last month, but I can’t remember well now ．
A. to introduce
B. to have introduced
C. to be introduced
D. to have been introduced
网友回答
A. to introduce
B. to have introduced
C. to be introduced
(答案→)D. to have been introduced
解析：考查seem to have done似乎已经做了什么，he和introduce是被动关系，用不定式的完成被动式，句意：上个月的聚会上好像有人把他介绍给我了，但我现在记不清了。选D.