过去完成进行时

• — Did you see the beginning of the film?
  — No. It ________ for 20 minutes when I got to the cinema.

  [     ]

  A. has been on
  B. had been on
  C. had begun
  D. has begun
  题型： 单选题 难度： 中档 查看解答
• The film _____ for ten minutes when I got to the cinema.          
  [     ]
  A. has been on
  B. had started
  C. had been on
  D. had begun
  题型： 单选题 难度： 中档 查看解答