A hobby is any activity a person likes to do in his spare time. So those who get busy in their activ

5. B    6. A    7. D
【解析】
【分析】
这是一篇议论文。文章主要讲述了个人爱好因人而异，从而引出作者自己的爱好“收集硬币”，同时阐明了这个爱好对于自己的影响：没有爱好的生活就像没有盐的食物。
【5题详解】
细节理解题。根据文章第一段内容“Hobbies vary from person to person”可知，爱好因人而异。因此，爱好是由个人决定的。故选B项。
【6题详解】
细节理解题。根据文章第二段内容“It is also one of the oldest hobbies of the world and is also called “hobby of the Kings”, as in the old times, it was only done by kings and elite class of the society.”可知，之所以收集硬币被称为“国王的爱好”是因为在古代，只有国王和社会精英阶层才会做。故选A项。
【7题详解】
推理判断题。根据文章第三段内容“It started for me some years back when my father used to come back from his foreign tours and give me coins of different countries.”可知，收集硬币的爱好始于几年前，那时作者的父亲从国外旅行回来，给作者带回不同国家的硬币。因此可推知，作者的父亲过去经常出国。故选D项。
【点睛】事实细节题
在阅读理解题中，有相当一部分属于事实或细节题。这种题目比较简单，只要通读全文，了解文中所叙述的重要事实或细节，就可以解答出来，有的甚至可以从文章的原句中直接找到答案。比如文章的第2小题：
2. Why was coin collection called “hobby of the Kings”?
A. In the past, only the kings and upper class could collect coins.
B The king could collect coins from all over the world.
C. Only the king could collect coins.
D. Kings had enough money to collect coins.
根据题干关键词，利用寻读法定位文章原文内容“It is also one of the oldest hobbies of the world and is also called “hobby of the Kings”, as in the old times, it was only done by kings and elite class of the society.”，由此可知，选项A与原文信息一致。故选A项。