“John took a photograph of you just now.” “Oh really? I .”A. didn’t knowB. wasn’t knowin

问题补充：

“John took a photograph of you just now.” “Oh, really? I .”

A. didn’t know

B. wasn’t knowing

C. don’t know

D. haven’t known

答案：

(答案→)A. didn’t know

B. wasn’t knowing

C. don’t know

D. haven’t known

解析：“不知道”是对方告诉自己之前的事，故用一般过去时。