填空题 从供选择的答案中选出应填入英语文句中()内的正确的答案。
By using MP3, a 600M-byte music CD can be

• (A) to 50M bytes or less. It can be streamed (downloaded in chunks) so that you can begin listening to the opening bars while the
• (B) of the life arrives in the background. And, most important,MP3 music files retain good listening
• (C) that
• (D) compression schemes lacked. That
• (E) of features makes accessing and distributing music on the Web practical for the first time.
  A: ① pressed ② compressed ③ compress ④ press
  B: ① past ② next ③ rest ④ host
  C: ① amount ② mass ③ quantity ④ quality
  D: ① earlier ② front ③ later ④ backward
  E: ① addition ② combination ③ difference ④ condition