— What did you think of Act I of the play last night?
— I’m sorry. The play when I got there.
A. had been started
B. had been on for half an hour
C. was to start
D. had begun for half an hour
网友回答
A. had been started
(答案→)B. had been on for half an hour
C. was to start
D. had begun for half an hour
解析：句意：戏剧在我到达之前就已上演了半小时，即表示“过去的过去”，且短暂性动词不与持续性时间连用，故须将 start→be on 才可与持续性时间连用。