早教吧 育儿知识 作业答案 考试题库 百科 知识分享

Itistruethatmanyoftheworld’sgreatestcitiesonthebanksofA.havebeenbuiltB.havebuiltC.arebeingbuiltD.werebuilt为什么要选A啊,为什么是现在完成时的被动语态

题目详情
It is true that many of the world’s greatest cities ______ on the banks of
A. have been built B. have built
C. are being built D. were built
为什么要选 A 啊,为什么是现在完成时的被动语态
▼优质解答
答案和解析
因为那些国家已经被建立,已经存在了,所以用完成时