Secondary and higher education available to all high school graduates in this country so

问题补充：

Secondary and higher education available to all high school graduates in this country so far.

A. have made

B. were made themselves

C. have been made

D. were made it

答案：

A. have made

B. were made themselves

(答案→)C. have been made

D. were made it

解析：将被动语态还原成主动语态就不难看出此题测试的是make sth. adj.结构，表示使成为……。