Question

【题目】The computer is used not only to play games but ____a tool for learning.

A. by B. as C. for D. to

Answer 1

【答案】B

【解析】

句意：电脑不仅被用来玩游戏，而且被用作学习的工具。be used by被……使用， be used as被用作，be used for被用于，be used to do sth被用来做某事，故选B。