how did you know the news I heard it _the radio.a,on b,from并说明理由
问题描述：
how did you know the news I heard it _the radio.
a,on b,from并说明理由
答
from!
怎么可能选A？！？！
答
I heard it on/over the radio.
祝你进步！
答
选A
hear from的意思是 收到...的来信
此处明显不是,故排除B
答
from
hear..from从...听说