偶也觉得第5题可能是C OR D 里面的一个选项出了问题。因为E里面的demonstrator是不对的。
第3题:I prefer C. 问中只有 Sherwin's research team speculated that ecological or social constraints during the evolution of this species might have resulted in there being little benefit from the social learning of atability这一处提到了reasons,而此处涉及reasons的原因,是为了更好的解释为什么鸟类有这样一种social behavior。所以选C~~
至于E,文章一直在说HENS会不会表现出对某种食物的喜好或者厌恶,并没有说这个现象的REASONS~第二段的确有个REASON,但是只是说了是什么原因导致AVIAN没有从LEARNING中或益(Sherwin's research team speculated that ecological or social constraints during the evolution of this species might have resulted in there being little benefit from the social learning of atability)