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随堂训练 (2015·衢州二模) A. Help you reach fitness goals B. Encourage more exercise C. Give a sense of safety D. Help with stress relief E. Create social interaction with others F. Help with better mental health Humans and dogs have been working together for thousands of years, and some scientists even believe the two species have been living with one another for thousands of years. While having a dog will not improve your health if you never wanted a dog in the first place, dog lovers can benefit from living with them. 1. ________ Most of us know the benefits of exercise, but it can be a struggle to find the motivation to get up and get moving everyday. A dog provides strong motivations, and can make your daily walk or run less lonely and more fun. Moreover, you’ll burn extra calories when helping your dog walk and doing brief training exercises with your dog. For some people, going for walks alone is scary, but a dog can make runs and walks more secure. I know that with Ranger. I have to walk him every day, and he’s always ready each morning. Sometimes we even have an afternoon or early evening walk, which is better for my health. 2. ________ There’s no doubt that dog ownership does come with some stresses, from making sure you’ve applied their weekly bath to worrying if your dog will get along with the other dogs at the dog park. But the benefits of pet ownership more than outweigh these small stresses. Research shows that a few minutes spent petting an animal lowers blood levels of the stress hormone, which contributes to tiredness, weight gain and aging, and your pet can help kill its negative effects. A few minutes playing with your dog every day also releases powerful “feel-good” hormones that continue to function in the bloodstream. | 
