Information technology is taught in most schools we have entered the information society

问题补充：

Information technology is taught in most schools, we have entered the information society.

A. so

B. while

C. still

D. for

答案：

A. so

B. while

C. still

(答案→)D. for

解析：因为句中的并列连词for表示原因，是对前面分句所述内容的解释或补充说明。