(单选题)

The author introduced her train friend to ______.

A.share her most memorable but boring journey

B.express her deep regret for losing touch with him

C.show that talking to strangers can add interest to life

D.explain why people are becoming indifferent

参考答案：C

参考解析：

细节理解题。根据文章第二段最后一句“It’s a rare person who can cheerfully break the social rule about not talking to strangers without any ill intention, but life would be more interesting if more of us knew how to do it.”可知，很少有人能高高兴兴地打破这样一个社会规则——不和陌生人说话没有恶意，但如果我们中更多人知道如何做，生活会更有趣。由此可知，作者介绍了她的火车朋友，以表明与陌生人交谈可以增加生活的乐趣。故选C。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语