问题补充:
Great changes in the city since1970.
A. have been taken place
B. have taken place.
C. has taken place
D. took place
答案:
A. have been taken place
(答案→)B. have taken place.
C. has taken place
D. took place
解析:句意:自从1970年,在这座城市里发生了很大的变化。分析从时间上体现了现在完成时,主语又是复数形式,因此用take place发生,现在完成时形式。故选B