33. Which of the following words is not an acronym?
(A) NBA
(B) WTO
(C) USA
(D) mom
Passage C
Scientists have now confirmed what many pet owners have long believed: some dogs have a more gloomy view of life than others. Dogs that were generally calm when left alone were also found to have an optimistic attitude, while those that barked, relieved themselves and destroyed furniture seemed to be more pessimistic, according to a study done at Bristol University. Michael Mendl, head of animal welfare and behavior at the university, said that if a dog was anxious when left alone by its owner, it would be pessimistic in its behavior. The research suggests that the problems caused by some dogs when they are left alone could indicate deeper emotional problems.
“Owners see this kind of anxious behavior in dogs in different ways. Some are very worried, some relinquish the dog to a dog’s home, but others think the dog is happy or just being spiteful,” said Mendl. “Some of these dogs may have emotional issues and owners should talk to their vets about possible treatments,” he added.