【正确答案】 B

【答案解析】[听力原文] 30-32 Ladies and gentlemen, (30) when we talk about getting on line we mean being connected to the internet, a giant network of computers that connects people and information all over the world. The internet has a lot in common with other forms of communication. Like the US postal service the internet allows anyone who knows your internet address to send you an electronic mail or email. Like the telephone the internet allows you to chat with other people by participating in online discussion groups. Like the library the internet contains information on almost any topic you can imagine in many formats, including books, articles, videos, and music recordings. In addition to words, one part of the internet, (31) the world wide web is especially interesting to people because it includes pictures and sounds. The internet began in the 1960s as a US department of defense communication network. Soon after university researchers and professors began to use it to communicate with others in their fields. Internet use really took off in the early 1990s with the arrival of the web, which made it easier to find and view information on line. (32) No one, no country, organization, or company is in charge of the internet. It's growing and its form and content is being changed by its users everyday. A computer that is connected to the internet allows you to turn your home, community center, local library, or school into a place of unlimited information and communication. 30. Q: What is the foundation for people to listen to music online? [未听先知] 根据各选项中的network，electronic mail，online discussion，chatting serviee等关键词可以推断本文可能与网络的使用有关。 [一点即通] 短文在开头提到上网就意味着要与计算机网络系统相连接，因此上网听音乐的基础就是先与计算机网络系统进行连接，故选B项。