While there are some differences in the educational systems in many countries in the world

问题补充：

While there are some differences in the educational systems in many countries in the world, education itself is .

A. beneficial

B. accessible

C. compulsory

D. universal

答案：

A. beneficial

B. accessible

C. compulsory

(答案→)D. universal

解析：形容词辨析。A有益的；B可(或易)接近的;可(或易)进入的；C强制的,义务的；D全体的;普遍的;一般的；句意：尽管在世界上很多国家的与体系有一些差异，但是教育本身却是共同的。