Question

—The authors of computer viruses are geniuses.
—I agree. If they applied their wisdom to other net technology _____ human beings can benefit, it would be better.

A．in which

B．through which

C．from which

D．during which

Answer 1

C

考查介词与关系词引导的定语从句。benefit from通过……获利。因此，选择C项。