2．You think you know your dog．（36）C She probably recognizes you when she sees you．But can a dog tell by simply looking at you whether you have a happy or an angry expression on your face？Researchers in Austria have taught pet dogs to know the difference．
（37）A When dog owners shout or speak in a strong，sharp voice，dogs often act guiltily and quietly move away from the area．
Recently，researchers found that dogs can look at our faces，and tell the difference between a smile and a frown．The animals were able to recognize a look of approval from one of disapproval．Researchers at the University of Veterinary Medicine performed a series of experiments．（38）F They showed the dogs two pictures of either the upper or lower half of a person's face．On one picture，the person looked happy．The other appeared angry．The dogs were then shown images of the eyes or mouths of people they had never seen before．
（39）D Once the dogs learned to recognize which image was happy or angry，they could easily identify the same expressions in pictures of any face．Future studies will try to show whether dogs can learn the meaning of facial expressions．（40）G
The researchers'findings were published in the journal Current Biology．They provide the first solid evidence that humans are not the only species that can read the body language of another species．
A．Dogs are very aware of sound．
B．Dogs have feelings just as you do．
C．But how well does your dog know you？
D．They were also shown the left half of the faces used in training．
E．Some dogs are very unhappy when they are left alone for a long time．
F．They taught dogs to recognize facial expressions．
G．For example，whether a frown shows that someone is angry．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了研究发现，狗其实是可以辨别人的声音，面部表情等的．
解答 36．C．推理判断题．由下一句"She probably recognizes you when she sees you．"可知，这里应该是说狗是怎么知道你，故应选C．
37．A．推理判断题．由下一句"When dog owners shout or speak in a strong，sharp voice，dogs often act guilty and quietly move away from the area．"可知，这里应该是狗可以识别人的声音，故应选A．
38．F．推理判断题．由下一句"They showed the dogs two pictures of either the upper or lower half of a person's face．"可知，他们应该是教狗识别面部表情，故应选F．
39．D．推理判断题．由下一句"Once the dogs learned to recognize which image was happy or angry，they could easily identify the same expressions in pictures of any face．"可知，这里仍然是教狗识别面部表情的，故应选D．
40．G．推理判断题．由下一句"The researchers'findings were published in the journal Current Biology．"可知，这里应该是举例说明研究者的发现，故应选G．
点评 七选五阅读是完成性阅读，和完形填空很类似，不同的是一个选词，一个选句子．解题时，要注意上下文语境，充分考虑信息词（选项中和空格前后句子中相同或相近的词），选出最符合语境的句子．
