Complete the text with the correct active or passive form of the verb in brackets.Peer-to-peer file sharing (P2P) is a process that allows files (1) to be downloaded (download) from other connected computers (called peers Similarly, your computer (2) (search) by other computers on the network by peers looking for files. File sharing (3) (begin) in 1999 when Napster (4) (introduce) a file sharing program and central server that linked people who had files with those who wanted files. When you (5)  (search) for a file, the server would find all of the available copies of that file. Then the files (6) (transfer) between the two private computers. Unlike P2P programs today, it was only possible for people (7) (share) music files.Napster (8) (prosecute) for copyright reasons and they (9) (shut down) in July 2001. They (10) (reopen) as a pay service some time later. After Napster shut down, new ways of sharing files (11) (develop) that did not require a central server. The most popular of these are based on a system called BitTorrent.