问题描述：
sat语法问题
Although familiar to us from representions in ancient art,war chariots are rare museum artifacts because by the sixth century B.C.they were no longer used in battle.
我想知道by+过去时间点,不应该是过去完成时么,为何这边是一般过去时,sat语法,OG原题
Although familiar to us from representions in ancient art,war chariots are rare museum artifacts because by the sixth century B.C.they were no longer used in battle.
我想知道by+过去时间点,不应该是过去完成时么,为何这边是一般过去时,sat语法,OG原题
问题解答：
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