A和B和C是朋友,C和D和A是朋友,有一天A和B遇到了C和D,A要把B介绍给C和D,C要把D介绍给A和B编成英语对话

A:Hi C,how are you these days?
C:i am fine ,what about you?
A:Not bad,oh let me introduce B to you.B this is C,he is my best friend.
B:Nice to meet you C.
C:Nice to meet you B,oh this is my friend D.D this is A and B.
D:Nice to meet you .