提醒：点这里加小编微信（领取免费资料、获取最新资讯、解决考教师一切疑问！）
A
When our Scottish puppy（幼犬）reached doggie adolescence, she suddenly stopped obeying my commands. Our dog trainer advised us to stop worrying. "She's a teenager," she said. "She'll grow out of it." Now, a new study is backing that up: Dogs experience an extremely sensitive period at the beginning of adolescence that makes them act out, just like human teenagers.
To see exactly how adolescence changes dog behavior, the researchers monitored 70 female German shepherds raised as potential guide dogs. They asked caregivers to score the puppies on their attachment and atention-seeking behaviors, such as sitting very close to their owner or displaying a particularly strong bond for one person.
Dogs with high scores on either scale entered adolescence earlier—at about 5 months, compared with 8 months for those with lower scores. Various reasons cause human teenage girls with poor parental relationships to also enter adolescence at a younger age. Thus, similar to humans, dogs that have tense relationships with their caregivers see changes in their reproductive development.
To test obedience（顺从）,the scientists assessed a separate group of 69 guide dogs, first at 5 months and later at 8 months. They asked the dog's caregiver and a stranger to give the command to "sit". All of the preadolescent puppies quickly sat for both people, but when the same puppies reached adolescence, many "repeatedly" refused to follow the order from their caregiver. However, they readily and annoyingly obeyed the stranger. Dogs that weren't securely attached to their caregivers were even more willing to follow the stranger's commands—again, much like human teenagers.
Because of the similarities between adolescent puppies and humans, dogs could serve as a model species for studying dolescence in humans, the scientists say. And on a more practical note, the temporary nature of dog disobedience might make us worry less when our puppies suddenly get minds of their own.
1. What makes the Scottish puppy disobey its owner?（ ）
A. Its being treated badly.
B. Its naughty nature.
C. Its relation with the owner.
D. Its being adolescent.
2. What do the scores in the study suggest?（ ）
A. Higher scores probably mean earlier adolescence.
B. The lower the score the tenser the relationship.
C. A puppy with a lower score could be a guide dog.
D. A girl scoring higher gets on well with her parents.
3. What is the result of the obedience test?（ ）
A. Human teens have a strong bond with puppies.
B. Puppies enter adolescence at the age of 5 months.
C. The 69 guide dogs can understand caregivers well.
D. Adolescent dogs without enough care prefer to follow the stranger.
4. What's the potential ignificance of the study?（ ）
A. To understand your dogs behavior.
B. To better study human adolescence.
C. To show the process of a research.
D. To help pet owners solve a puzzle.
提醒：点这里加小编微信（领取免费资料、获取最新资讯、解决考教师一切疑问！）
