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。