Wang Gang is considering buying a puter, is considered to be a great help in our work and study.
A. as
B. which
C. that
D. what
网友回答
A. as
(答案→)B. which
C. that
D. what
解析： 考查非限制性定语从句。先行词是a puter，在从句中作主语，as正如，正像，不符合句意；that不能引导非限制性定语从句；what不能引导定从。所以选B。