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
网友回答
A. That; keep on
B. which; keep out
C. It ; keep back
(答案→)D. As; keep up
解析：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。