The skeleton of ________ bird that was recently discovered indicated that this ancient creature ________ today's birds in that , unlike earlier birds and unlike reptilian ancestors, it had not a tooth in its head .
(A) A primitive (D) Preempted
(B) A contemporary (E) Anticipated
(C) An advanced (F) Differed from
第二个空为什么不选F啊==Ｆ多好的选项啊，表示this ancient creature与today's birds是不同的，然后后面解释哪里不同==
我在一个网上看到一个这样的解释==
解答这一题时，需明白unlike earlier birds and unlike reptilian ancestors修饰的是this ancient creature，而it指代的内容也是this ancient creature；即这只鸟和更早些的鸟类及爬行类动物的祖先不同，它是没有牙齿的。这一演变预示了今天的鸟类也是没有牙齿的！
本句话中提及的the primitive bird与today's birds均是没有牙齿的，所以第二空所选词肯定为E项anticipate。
然后我就晕了==感觉说的不对吧。。。填空题里不是就是2个物体之间的对比么==这里出现了3个，unlike earlier birds and unlike reptilian ancestors修饰的明明就应该是today's birds吧==