what is your favorite subject?你最喜欢的学科是什么?
回答就说 My favorite subject is history.
一般疑问句
Is your favorite subject history?你最喜欢的学科是历史吗?
回答只能是yes/no.即：Yes,it is.
No,it isn`t.My favorite subject is Maths.
（举的例子）