After class I like playing computer games and chatting my friends the Internet. A. to;

问题补充：

After class, I like playing computer games and chatting my friends the Internet.

A. to; by

B. with; on

C. for; in

D. about; through

答案：

A. to; by

(答案→)B. with; on

C. for; in

D. about; through

解析：to到，向；by通过；with和，伴随，用某种工具；on在上面，通过某种媒介；in在里面；about关于；through从内部通过。句意：课后，我喜欢玩电脑游戏和朋友们在网上聊天，结合语境可知选B。