Question

Xiao Ming as well as his parents ________ to the Great Wall twice.

1. A.
   has been
2. B.
   have been
3. C.
   has gone
4. D.
   have gone

Answer 1

A
Aas well as连接两个主语，谓语动词的单复数根据前一个决定。已去过某地用have been to表示。