一个单选I've-----him but I don't know him A.heard about B.learned C.heard from D.heard
问题描述：
一个单选I've-----him but I don't know him A.heard about B.learned C.heard from D.heard
答
A heard about
我听说过他,但我不认识他.
learn学习
hear from收到某人的信
hear听到