来自唐翔弘的问题
weallknowthatpaper(.)bychinesepeopleintheolddaysA.wasinventedB.areinventedC.Isinvited
weallknowthatpaper(.)bychinesepeoplein
theolddaysA.wasinventedB.areinventedC.Isinvited


weallknowthatpaper(.)bychinesepeopleintheolddaysA.wasinventedB.areinventedC.Isinvited
weallknowthatpaper(.)bychinesepeoplein
theolddaysA.wasinventedB.areinventedC.Isinvited
A.wasinvented过去式,被动语态