2. 外语
  3. New research from Australia supports the belief that many pet owners have — it shows that pets are good for your health. The【C1】

New research from Australia supports the belief that many pet owners have — it shows that pets are good for your health. The【C1】

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问题     New research from Australia supports the belief that many pet owners have — it shows that pets are good for your health. The【C1】______of this new study suggest that people who have pets are【C2】______less risk from heart disease than【C3】______who do not.
    Ironically this【C4】______study on pets was intended to【C5】______the myth that pets are good for your health. Earlier research【C6】______the benefits of owning pets received a lot of【C7】______, but the results were not good enough to【C8】______the more skeptical doctors. The new research was carried【C9】______over three years and examined 6000 people, the largest group yet involved in【C10】______a study. They took tests that measured a【C11】______of different factors known to be【C12】______in heart disease —【C13】______and blood levels of cholesterol(胆固醇)and triglyceride(甘油三酸酯). 【C14】______, people were asked about their lifestyles.
    The 800 people who owned pets had【C15】______levels on each of the factors【C16】______than those who did not own pets. The differences were even greater than those found in similar studies on people who【C17】______to vegetarian diets or took【C18】______exercise. The study also showed that it did not matter【C19】______kind of pet was owned — a cat was as good as a dog — so the benefits could not be attributed【C20】______the exercise involved in walking a dog.
【C11】
选项 A、kind
B、sort
C、variety
D、difference
答案C
解析 固定搭配。a variety of为固定搭配，意为“多种的，种科的，各种各样的”，而A和B只表示一种，difference“差别，差异”，与题意不符。故答案为C。
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