As I met him I didn’t him for we haven’t seen each other for many years.A. knowB. know a

问题补充：

As I met him, I didn’t him, for we haven’t seen each other for many years.

A. know

B. know about

C. recognize

D. find out

答案：

A. know

B. know about

(答案→)C. recognize

D. find out

解析：考查动词辨析。由后句暗示好长时间没有见面，应该为认不出来的意思。