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超简单英语问题!Oh,yourcountryisnotwhatitusedtobewhenIvisitedittwentyyearsago.Yes.Greatchanges,especiallyintheeasternareas,sincethen.A.tookplaceB.havebeentakenplaceC.havetakenplaceD.hasbeentakenplace一定

题目详情
超简单英语问题!
Oh,your country is not what it used to be when I visited it twenty years ago.
Yes.Great changes,especially in the eastern areas,___ since then.
A.took place B.have been taken place C.have taken place
D.has been taken place
一定要说出为什么!
▼优质解答
答案和解析
C have taken place 现在完成时,因为句中有since then,take place 不能用被动语态