（）before,I didn't know what she looks like.A.Not having seen her B.having seen herC,Not seeing her D.Seeing her .who can help me?

（）before,I didn't know what she looks like.A.Not having seen her B.having seen herC,Not seeing her D.Seeing her .who can help me?
（）before,I didn't know what she looks like.A.Not having seen her B.having seen her
C,Not seeing her D.Seeing her .
who can help me?

（）before,I didn't know what she looks like.A.Not having seen her B.having seen herC,Not seeing her D.Seeing her .who can help me?
A not having seen her 之前从没见过,所以我不知道她长什么样.
having done表示发生在谓语动词前.

D