Lin Yi isn’t what it used to be．The last decade great changes in the city images．
A. witnessed
B. was witnessed
C. has witnessed
D. had witnessed
网友回答
A. witnessed
B. was witnessed
(答案→)C. has witnessed
D. had witnessed
解析：考查时态。句意：Lin Yi不在是以前的样子了，最近十年已经见证了城市面貌的重大变化。动作时从过去一直持续到现在，所以选C。