The first decade of the 21st century breathtaking, non-stop development in China.
A. witnesses
B. witnessed
C. will witness
D. had witnessed
网友回答
A. witnesses
(答案→)B. witnessed
C. will witness
D. had witnessed
解析：句意：在21世纪的第一个十年见证了中国了惊人的不停的发展。这里很明显前十年已经过去了，所以用过去式，故选B。