问题补充:
Smile is recognized as a/an language, which can be understood by people all over the world.
A. artificial
B. technological
C. universal
D. analytical
答案:
A. artificial
B. technological
(答案→)C. universal
D. analytical
解析:A. artificial人造的 B. technological技术的 C. universal通用的 D. analytical善于分析的;句意:微笑被认为是一种通用语言,它能被全世界的人们理解。故选C