weallknowthatpaper(.)bychinesepeopleintheolddaysA.wasinventedB.areinventedC.Isinvited
2022-05-20 28次 反馈错误 加入收藏 正确率 : 100%
题目内容：
we all know that paper (.) by chinese people in
the old days A.was invented B.are invented C.Is invited
优质解答
A.was invented 过去式,被动语态
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