[解析]
(1)C.细节理解题,根据第二段The term"podcast"was invented in 2004,but the trend only started gaining mainstream popularity in recent years.With the sharp increase in consumer demand for smartphones and tablets,podcast sales have jumped.可知"播客"这个词是在2004发明的,但这种趋势在最近几年才开始受到主流的欢迎,随着消费者对智能手机和平板电脑需求的急剧增加,播客的销量猛增..所以播客今天已经变得非常流行,故选C.
(2)B.细节理解题,根据第三段"I listen while I'mw andering around the house doing something else.It makes completing a boring task much more enjoyable…And it's an easy way of keeping in touch with what's going on in the rest of the world,"可知,唐娜•杰克逊一边听一边在屋子里闲逛,还能做其他的事情,这使得完成一个无聊的任务变得更愉快…这是保持与世界其他地方联系的简单方法.所以作者提及唐娜•杰克逊是为了解释了年轻人喜欢播客的原因,故选B.
(3)B.推理判断题.根据"Unlike television and music,the audio format has the potential to create a deep impression on readers"可知第五段主要介绍了博客的优势.故选B.
(4)A.主旨大意题,通读全文可知本文作者主要向我们介绍了播客,它的流行及其原因和播客的优势,让我们重返广播时代,故选A.