Mary went to the box office at lunch time, but all the tickets ____ out.
A. would sell B. had sold C. have sold D. was selling
Mary went to the box office at lunch time, but all the tickets ____ out.
A. would sell B. had sold C. have sold D. was selling
B
句意: 玛丽在午餐时间去了售票处, 但是所有的票都已经卖完了。根据题干信息Mary went to...为过去时间, 而票售完在此时间参照点之前, 即“过去的过去”。