Some photos____by African children.A.are taken B.were taken C.have been taken 为什么选B?原因?

Some photos____by African children.A.are taken B.were taken C.have been taken 为什么选B?原因? What are on show in the museum?Some photos____by African children.A.are taken B.were taken C.taken D.have been taken What are on show in the museum?Some photos____by the children of Yushu.A.have been taken.B.What are on show in the museum?Some photos____by the children of Yushu.A.have been taken.B.were taken.C.are taken.D.taken为什么不选C What are on show in the museum?Some photos____by children of YuShu空里应该填were taken 还是taken.道理说得通俗一点,不要太多术语.顺便翻译一下. 被动语态选择题What are on show in the museum?Some photos____by African children.A.are taken B.were taken C.taken D.have been taken我想要解释同思考过程..谢啦 What are on show in the museum? Some photos____by children of YuShu.如果空格填taken句子怎么样翻译?如果空格填were taken怎样翻译?如果句子是Some photos which were taken by children of YuShu.又该作何翻译? 英语被动语态,被动语态一般情况下是be+VPP什么时候be会省略,比如The girl called Lucy 今天做了一道选择题 A：What are on show in the museum?B：Some photos____by children of YUshu.A:have been taken B：were taken C：are af.a af. some some some some some some Some some some some