I haven't heard from Henry for a long time.But I don't know what_____to him?

问题描述:

I haven't heard from Henry for a long time.But I don't know what_____to him?
A.to happen B.was happening
C.has happended D.had happened

选C happen 一般这么用:sth happened to sb.没有to do 不定式,没有ing形式