―Hello! May I speak to Jack please? ―Yes speaking. ―Oh I your voice at first.A. don’t

问题补充：

―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

答案：

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。

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