For some students the computer serves only a tool that is used to play games.A. ofB. inC

问题补充：

For some students, the computer serves only a tool that is used to play games.

A. of

B. in

C. as

D. to

答案：

A. of

B. in

(答案→)C. as

D. to

解析：介词辨析。A.……的 B.在……里面 C. 作为 D. 到。句意：对于一些学生来说，电脑只是作为一个我们玩游戏的工具。故选C。