"Good-bye,Mr.Chen.I'm pleased __________."
问题描述：
"Good-bye,Mr.Chen.I'm pleased __________."
A,to meet you
B,meeting you
C,to have been meeting you
D,to have met you
答
d已经遇到过了
to do表示要做某事
to have done表示已经做过
i'm pleased to do/to have done