Great changes _ since he left his hometown.A. have taken placeB. have been taken placeC. w

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。