how did you know the news I heard it _the radio.a,on b,from并说明理由_英语解答

how did you know the news I heard it _the radio.
a,on b,from并说明理由

人气：162 ℃　时间：2019-09-29 04:37:09

解答

选A
hear from的意思是收到...的来信
此处明显不是,故排除B