The last decade of the 21st century the rapid, steady development of China in various fields.
A. witnessed
B. was witnessed
C. is witnessed
D. had witnessed
网友回答
(答案→)A. witnessed
B. was witnessed
C. is witnessed
D. had witnessed
解析：考查时态语态：句意是：21世纪的最后十年见证中国在各个领域的快速稳定的发展。时间隐含在上下文之间，就是21世纪的最后十年，用过去时，也是主动。选A。