social contact 社会关系，社会往来

bacterial microbiome 细菌微生物群

gut 肠道

on one’s lonesome 单独的，独自的

cardiac arrest 心脏停搏

your heart skips a beat（形容紧张或兴奋）心跳停了一下

top dog 最好的狗，胜利者

cross my heart 我保证所说属实

测验与练习 1. 阅读课文并回答问题。

1. What reasons does the author give for loving dogs?

2. When did the study mentioned in the article take place and who were its participants?

3. Which three reasons are given for a dog reducing a person’s cardiovascular risk?

4. True or false? Single-household dog owners see no health benefits compared to single-household non-owners.

5. What limitations are mentioned that could affect the results of the study?

2. 请在不参考课文的情况下完成下列练习。选择一个意思合适的单词填入句子的空格处。

1. That dog doesn’t have an owner so come away immediately. Can’t you see it’s a ______? It might have a disease!

tame       Fido       stray       mongrel

2. Quickly, nurse. He’s going into ______. Get me the defibrillator!

microbiome       top dog       canine       cardiac arrest

3. He won’t bite, but he doesn’t like being touched. It’s ______ his last owner, who used to beat him.

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