问题补充:
Great changes _ since he left his hometown.
A. have taken place
B. have been taken place
C. were taken place
D. took place
答案:
(答案→)A. have taken place
B. have been taken place
C. were taken place
D. took place
解析:句意:自从他离开家乡以来,家乡发生了很大的变化。这句话的主语是great changes,大的变化,take place是一个固定短语,意思是发生,它不能用于被动语态,故排除B和C。句子中有since,它常和现在完成时连用,故应选A。