OG15, SC65问题求助

kyo_looo

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

求问答案C中，scientists have gathered evidence suggesting that complex life-forms emerged much earlier than（）previously thought.省略了什么成分？

柠晓夏

感谢分享！               

kyo_looo

sheldooper 发表于 2015-7-10 18:26
scientists

比较的句式的话不是应该和earlier平行的吗。。

sheldooper

scientists