问题
选择题
------ The authors of computer viruses are geniuses.
------ I agree. They can apply their wisdom to other net technology ________ human beings can benefit.
A．in which
B．through which
C．on which
D．from which
答案
答案：D
考查定语从句。先行词为other net technology，短语：从什么当中获益benefit from,所以用from which，which 指前面的先行词，故选D。