问题补充：
Great changes in this city over the past five years.
A. took place
B. have taken place
C. were taken place
D. have been taken place
答案：
A. took place
(答案→)B. have taken place
C. were taken place
D. have been taken place
解析：根据时间状语over the past five years，句子要用现在完成时态，且take place无被动语态，所以选B。
