―Hello! May I speak to Jack, please?
―Yes, speaking.
―Oh, I your voice at first.
A. don’t recognize
B. didn’t
C. hadn’t recognized
D. haven’t recognized
网友回答
A. don’t recognize
(答案→)B. didn’t
C. hadn’t recognized
D. haven’t recognized
解析：说话的时候已经听出来是Jack的声音，“没听出来”是说话前的动作，用过去时。