The author of this article has been working for many years on the __________1___________ (动物智能) . She realized that if animals can think, __________2____________________ (它们会在能为自己所用的时候，而不是科学家让它们思维的时候进行最佳思维). In the example of “Let’s Make a Deal”, Jendry’s and Miles’s experiments with Colo and Chantek revealed the evidence that ___________3________________ (动物有以物换物的技能). In another story of “Tale of a Whale”, Laule found that animals want to cooperate with human beings when they learn ________4____________ (合作于己有利时). Moreover, they can assess a situation, ____________5__________________(然后根据自己的判断采取行动). ______________6________________(有时动物的智能可以从其欺骗的企图中得以证明). A case in point is Melati and Towan. Animal’s horizons are more limited than ours, but it is still comforting to realize that ____________________7________________________ (动物却也能退后一步清醒地审视周围的世界).