问题
选择题
_______ is known to the world, the Chinese in many places _______ the old tradition.
A．That; keep on
B．which; keep out
C．It ; keep back
D．As; keep up
答案
答案：D
第一空考查由as引导的非限制性定语从句，as 正如，指后半句话的含义，keep up 保持，句意：正如全世界所知，在许多地方中国人保持着古老的传统。所以选D。