"His father 'frequently' reads history books" has been suggested to be an acceptable answer.
Jing Chang can mean always, regularly, frequently. These synonyms should be accepted.
his dad often reads historical books. 不对吗
"Regularly" was not accepted as an answer.
What about 'studies' instead of 'reads' for 读?
Yeah.. is it possible to read 读什么书 as study something here?
His papa often reads history books: marked as wrong!!!!!