Question

    Have you ever thought of the reason why dogs are human's best friends? What's the bond (关系) between humans and dogs? A new study by a Japanese scientist Miho Naeasawa seems to have found the answer,and @ has something to do with the cuddle (裯抱) chemical.

   The cuddle chemical has another,more scientific name: oxytocin (催产素) .Oxytocin is something in the blood that encourages bonding. Levels of oxytocin increase,for example,when a mother feeds her newborn baby. According to Nagasawa9s study,levels of oxytocin can also go up when we look deeply into the eyes of a dog.

   Humans and dogs have been working together for nearly 30,000 years. In order to better understand how the cuddle chemical worked between dogs and humans,Nagasawa and his team did an experiment. They tested levels of oxytocin in dogs and humans,and then put them in a room to interact (交流) with each other. While in the room,the humans pet the dogs,spoke to the dogs,and looked into the dogs’ eyes. Then the scientists tested their levels of oxytocin again.

    The researchers found that levels of oxytocin were higher in both humans and dogs after they interacted. However,levels were the highest in the humans and dogs that simply looked into each other's eyes,without much petting or talking. The longer the humans looked into the eyes of the dogs,the more cuddle chemical was let out. Nagasawa did the same

experiment with humans and wolves (狼) ，but it did not give the same results.

53. The underlined word "it" in Paragraph 1 refers to.

   A. something   B. the answer

   C. a new study   D. the cuddle chemical

54. Nagasawa did the experiment of humans and dogs to know

   A. how oxytocin worked

   B. how oxytocin was divided

   C. how they helped each other

   D. how they interacted with each other

55. Oxytocin levels reached the highest in the humans and dogs

   A. when they looked into each other's eyes

   B. when they talked with each other

   C. if the dogs cuddled the humans

   D. if the humans petted the dogs

Answer 1

53. B 54. A 55. A

[阅读D篇短文大意]狗是人类最好的朋友。文章通过 Nagasawa所做的实验来揭秘人和狗之间拥有亲密关系的原因。

53. B 由第一段中的” A new study by a Japanese scientist Miho Nagasawa seems to have found the answer” 可知应选 B 

54. A 由第三段中的” In order to better understand how the cuddle chemical worked between dogs and humsms,Nagasawa and his team did an experiment” 可知应选 A.

55. A 由最后一段中的” However,levels were the highest in the humans and dogs that simply looked into each others eyes,without much petting op talking” 可知选项 A 符合题意。