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During the Renaissance, scholars were uncertain as to the location of Troy, and by the eighteenth century many historians doubted that Troy had ever existed. (A) doubted that Troy had ever existed (B) doubt that Troy has ever existed (C) were in doubt as to the existence of Troy (D) were doubtful concerning Troy’s existence(A) (E) had doubts about Troy’s ever existing
按照语法规则,by+过去时间,主句时态需要用过去完成时,请问大牛,为什么这里不用过去完成时而用过去式呢? |
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