647.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

648.Go _______ the gate and you'll find the entrance _____ the park ________ the other side.

A.through;to;on

B.along;of;on

C.down;to;at

D.up;of;by

647.答案是C;

考查介词与关系代词引导的定语从句。benefit from 从…中受益。

648.答案是A;

go through 穿过，经过；the entrance to the park 通过公园的入口处；on the other side在对面。