——map dated back to about 3000 B.C

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——map dated back to about 3000 B.C
A,The oldest known.B,It was the oldest known.
为什么选A

选A.
The oldest known map dated back to about 3000 B.C .
句意：已知最古老的地图回溯到公元前3000年.
dated back to 无被动形式,所以不可能是过去分词形式作定语,只能是过去式形式的谓语动词.
如果选B,谓语动词是was,那么后面的dated back to就是非谓语,这是说不通的.

——map dated back to about 3000 B.C 非谓语.求讲解.（）map dated back to about 3000B.C. __map dated back to about 3000B.C 什么时候用dated back to dates back to和dated back to的区别求dated from ,dated back to ,be traced to 的区别, date back to可以用被动语态吗?就是 be dated back to~ ( ) 2.A.back B.fast C.have D.map 找出画线部分读音不同的单词, An on the back (),there is a map.A bookcase B floor C wall D He wants to run ______ home.A.to B.back to C.back D.to back This is a map ___ Japan.A.of B.in C.at D.about The bridge dated back to hundreds of years was being repairi