填空题 从供选择的答案中选出应填入英语文句中()的正确的答案。
Software products may be

• (A) into four basic types: application programs, programming language processors, operating systems, and system utilities.
  Application programs are programs that
• (B) useful tasks such as solving statistical problems, or keeping your company's books.
  Programming language processors are programs that
• (C) the use if a computer language in a computer system. They are tools for the development of application programs.
  Operating systems are programs that
• (D) the system resources and enable you to run application programs.
  System utilities are special programs that
• (E) the usefulness of or add capabilities to a computer.
  A～E: ① manage ② perform ③ support ④ reduce
  ⑤ divided ⑥ enhance ⑦ implemented ⑧ introduce
  ⑨ ranked ⑩ run