【正文】 savedailytooaleftoverfoodtastebuyshouldonlike．( )50．What39。topictdiebeallorder． BYour dog may prefer being praised rather than being given food.A team studied on 15 dogs to find out the answer. They used a toy car, a toy horse and a hair brush.After the team showed the dogs a toy car, their owners would praise them. After the team gave the dogs a toy horse, the dogs got a piece of a hot dog. Their owners wouldn’t e to see them. After the team gave the dogs a hair brush, nothing happened. When praised, 13 of the 15 dogs became more active in their brains. Then a Yshaped maze(迷宮) was set up. The dog’s owner was waiting at one entrance and food at the other. At first, the team made four trials(實(shí)驗(yàn)). In the first and fourth trial, the dog could only choose its owner. In the second and third trial, the dog could only choose the food. After the four trials were finished, the team made the real experiment. They found that most of the dogs ran into their owner’s arms.The team suggests that organizations can use these types of experiments to decide if a dog is suitable(合適的) for a certain kind of service job. Dogs who prefer praise will be more useful in assistance jobs. And those who show less interest in praise could be more useful in searchandrescue, because they do not need too much human contact(接觸) .( )51. What happened after the dogs were given a toy car?A. Their owners praised them . B. They got food and saw their owners.C. They got food only. D. Nothing happened.( )52. In the four trials before the real experiment, the dog would see ______ in order.A. food—owner –owner—food B. food—food—owner—ownerC. owner—food—food—owner D. owner—owner—food—food( )53. If a dog shows more interest in food, it can do better in ________.A. helping blind people B. forting sad peopleC. helping people who can’t walk freely D. searching people after disasters( )54. What does the team suggest that we can use these types of experiments?A. To decide which kind of job is suitable to a dog.B. To tell owners should praise the dogs.C. To tell owners should give the dogs food enough.D. To tell owners should praise rather than give food to the dogs.( )55. What’s the best title for the passage?A. Trial or Praise B. Praise or Food C. Trial or Food D. Owner or FoodCZhang Ming, a college graduate from Shandong, created a 9page “WeChat guide”. With drawings and simple words, the stepbystep guide explains how to send messages, take pictures and make video calls. Zhang made the guide for his parents. “My parents are getting old. They need an easy way to learn how to use new technology,” he said. Zhang’s experience is mon nowadays. Worldwide, 40% of parents learn about new technologies, including puters, mobile Internet and social media(社交媒體), from their children, according to a study from the International Communication Association in 2014. Parents used to teach their kids about almost everything. Now for the first time, the teachers bee the students, and the students turn into the teachers. The change of roles es from the rapid development of society and technology, says Zhou Xiaohong, a sociology (社會學(xué)) professor from Nanjing University. Zhou said the Internet and other forms of media give children ways to get information besides from asking older generations. Therefore, in the age of information, it’s possible that children know more than their parents do.According to the China Internet Network Information Center, % of Internet users and 67. 2% of socia