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Many people like sharing their times for their latest mile run on social media. You might think it is superfluous or tiresome when you see it. But a new study finds that it will actually motivate you to run more. It is contagious. The study examined exercise habits of more than one million runners across a five-year period. It shows that knowing the running behaviors of your friends as shared on social networks can cause you to run farther, faster, and longer. Previous studies on health and lifestyle have found similar contagions for phenomena like obesity, anxiety and weight loss.

1.When you see your friends sharing their times for their latest mile run, you might think it is ____.

A boring　

B thirsty　

C interesting

D contagious

解析：选A。细节理解题。根据第一、二句Many people like sharing their times for their latest mile run on social media. You might think it is superfluous or tiresome when you see it.可知，故选A。

2. What will motivate you to exercise more?

A You want to lose weight.

B You plan to meet you friend.　

C You fall in love with someone. 　　

D You see the running behaviors of friends.

解析：选D。细节理解题。根据第三句But a new study finds that it will actually motivate you to exercise more.并结合上下文可知，故选D。

3. As a result of knowing the running behaviors of your friends, you won’t run ____.

A faster

B longer

C less

D farther

解析：选C。细节理解题。根据倒数第二句 It shows that knowing the running behaviors of your friends as shared on social networks can cause you to run farther, faster, and longer.可知，故选C。

4. Which one doesn’t have the similar contagion for phenomena?

A Obesity.

B Anxiety.

C Wealth.

D Weight loss.

解析：选C。细节理解题。根据最后一句Previous studies on health and lifestyle have found similar contagions for phenomena like obesity, anxiety and weight loss.可知，故选C。

5.Which is the best title of the passage?

A Exercise Habits.

B Health and Lifestyle.

C Running Is Contagious.

D Run Farther, Faster and Longer.

解析：选C。细节理解题。根据全文可知，文章主要说了跑步是有传染性的，通过社交网络了解到朋友在进行体育锻炼也会激励自己锻炼时跑得更远、更快、时间更长，故选C。