Danger-junkieorangutans（猩猩）inBorneoclimbdeadtreesandshakethenuntiltheybegintofall．Theyscreamwithexcitementastheyclingtothefallingtree．Justbeforethetreehitsthegroundtheorangutansleaptoanothertreeorvine

Question

Danger-junkie orangutans（猩猩） in Borneo climb dead trees and shake then until they begin to fall．They scream with excitement as they cling to the falling tree．Just before the tree hits the ground the orangutans leap to another tree or vine，narrowly escaping death．While no one cab ask orangutans if they enjoy it as a person playing an extreme sport，one animal behaviorist sees this monkey fun as a bit of harmless thrill-seeking．
A growing number of scientists agree that animals are conscious and capable of experiencing basic emotions（情感），such as happiness，sadness，boredom or depression．A few scientists even see the possibility for higher animal emotions like love，jealousy and spite．
Five years ago，behaviorist and animal-rights activist Dr．Jonathan Balcombe stood on a Virginia hotel balcony watching two crows intimately groom（清洁） each other in the comfort of an abandoned billboard．He felt that the birds liked what they were doing，even if engaged in a natural，beneficial act，such as picking parasites（寄生虫） off the other's feathers．That moment changed the way he would view animals forever and led to a book，"Pleasurable Kingdom：Animals and the Nature of Feeling Good"，which is filled with hundreds of examples of animals living it up thanks to developed senses of touch，taste，sight，sound and smell．
Balcombe recounts a favorite example of Kenyan hippos（河马） having high-end spa treatment in a fresh water spring．They splay their toes，open their mouths wide and wait for a school of cleaner fish to remove parasites and slough off dead skin，he recalls．Balcombe knows that the hippos and the fish both benefit from this arrangement．"My interpretation is that it is also enjoyable for them，"he says．
28．Danger-junkie orangutans shook the tree to___．
A．get some fruits  
B．enjoy themselves   
C．train their escaping skills  
D．frighten other animals
29The purpose of the first paragraph is to___．
A．describe an unusual scene among animals   
B．give an example that animals can experience pleasure．
C．make a comparison between monkeys with humans         
D．show that animals can avoid danger
30．The passage leads us to the belief that___．
A．animals can experience emotions．
B．animals have a way to adapt to their environment
C．animals can copy what humans do        
D．animals are only eat-or-be-eaten beasts
31．We can conclude from the passage that___．
A．only a few animals have emotions．
B．Balcombe's theory is not supported by other scientists
C．Balcombe has watched a lot of animals showing emotions
D．Balcombe can understand animal language．

Answer 1

28．B．细节理解题．根据第一段：While no one cab ask orangutans if they enjoy it as a person playing an extreme sport，one animal behaviorist sees this monkey fun as a bit of harmless thrill-seeking可知danger-junkie猩猩摇树是因为好玩；故选B．
29．B．推理判断题，根据第二段：A growing number of scientists agree that animals are conscious and capable of experiencing basic emotions（情感），such as happiness，sadness，boredom or depression可知文章第一段的目的是举例动物能够体验快乐；故选B．
30．A．主旨大意题．通读全文，可知文章主要讲动物是有意识的，能够享受基本的情绪（情感），如快乐、悲伤、无聊或抑郁等，故选A．
31．C．细节理解题．根据最后一段：Balcombe recounts a favorite example of Kenyan hippos（河马） having high-end spa treatment in a fresh water spring可知 Balcombe已经看了很多动物的情感；故选C．