— This is Tom speaking.— Oh it’s great. But I your voice just now.A. didn’t know B. didn

问题补充：

— This is Tom speaking.

— Oh, it’s great. But I your voice just now.

A. didn’t know

B. didn’t recognize

C. didn’t hear

D. don’t know

答案：

A. didn’t know

(答案→)B. didn’t recognize

C. didn’t hear

D. don’t know

解析：考查时态，由后面的时间状语just now，可以知道时态是一般过去式，recognize表示识别，know表示了解，句子意思“但是刚才我没有识别出他的嗓音”