标题: 求助一道OG有关过去完成时 [打印本页] 作者: mayarie 时间: 2014-6-16 16:36 标题: 求助一道OG有关过去完成时 65. Digging in sediments in northern China, evidence has been gathered by scientists suggesting that complex life-forms emerged much earlier than they had previously thought.
(A) evidence has been gathered by scientists suggesting that complex life-forms emerged much earlier than they had
(B) evidence gathered by scientists suggests a much earlier emergence of complex life-forms than had been
(C) scientists have gathered evidence suggesting that complex life-forms emerged much earlier than
(D) scientists have gathered evidence that suggests a much earlier emergence of complex life-forms than that which was
(E) scientists have gathered evidence which suggests a much earlier emergence of complex life-forms than that
答案是C,想问一下A里的had是否有错呢?好像没有看到这一点的解释.....
作者: DUKB24 时间: 2014-6-16 16:42
首先应该是had been thought
再来,考虑timeframe
had been thought(这里应该是指科学家或者研究人员)
那合乎逻辑的应该是complex life forms 先emerged (原选项是simple past),这个现象出现了之后才可以开始被研究和被thought吧(所以这里用过去完成时不合理)作者: mayarie 时间: 2014-6-16 17:20
DUKB24 发表于 2014-6-16 16:42
首先应该是had been thought
再来,考虑timeframe
had been thought(这里应该是指科学家或者研究人员)