题目内容：

I've never seen this kind of butterfly before.
______
A.Neither did Xiao Ming
B.So did Xiao Ming
C.So has Xiao Ming
D.Neither has Xiao Ming.

优质解答

D.
首先never出现的时候看作否定句.因此BC排除,
其次have 在这个句子里是have +seen,have是属于助动词,因此不需要再借助do了.直接用has