For the past four decades, Billy Bar - he insists his name be written with lower case letters only -

4. C    5. B    6. A    7. D
【解析】
【分析】这是一篇记叙文。文章主要介绍了Billy Bar一个独自居住在Gothic, Colorado，他有记录降雪数据的爱好，令人惊喜的是他的这些数据对科学家研究天气变暖有很大的帮助。
【4题详解】
细节理解题。根据文章最后一段“The modern-day hermit claims that the sole goal behind his epic journal was to fight boredom.（这位现代隐士声称，他这史诗般记录是为了与无聊作斗争。）”可知，他记录各种自然气候的数据是为了打发时间，故选C。
【5题详解】
细节理解题。根据文章第二段第二句“He liked the quiet life here so much that he completed his semester to get his degree and became a permanent resident of the mountainous ghost town.（他非常喜欢这里安静的生活，所以他完成了一个学期的学业，拿到了学位，并成为了这个山区鬼城的永久居民。）”中的“the mountainous ghost town（多山的鬼城）”可知，Gothic, Colorado多山，故选B。
【6题详解】
细节理解题。根据文章第二段第二句“He liked the quiet life here so much that he completed his semester to get his degree and became a permanent resident of the mountainous ghost town.（他非常喜欢这里安静的生活，所以他完成了一个学期的学业，拿到了学位，并成为了这个山区鬼城的永久居民。）”可知，他喜欢这里的安静所以定居下来。故选A。
【7题详解】
细节理解题。根据文章最后一段“Luckily, the owner of an abandoned mining shack was kind enough to let Billy move in, to keep him from freezing to death. It became his home for the next eight years, and also the place where he started his impressive database on snow. （幸运的是，一个废弃的采矿窝棚的主人好心地让Billy搬进来，以免他冻死。在接下来的8年里，这里成了他的家，也是他开始建立令人印象深刻的雪数据库的地方。）”可知他记录数据的地方是采矿小屋。故选D。