what is that all about?请问这里的all about 看成一个词组,还是all 修饰about的?

is that what all this noise is about? Is that all?和What anything else?有什么区别? Excitement:that's what learning is all about. what is the meaning of That all your 'prince?. lifehand in hand,that is what love all bout Is that( )he said A.all what B.all which C.all D.which Is this you want?A.what B.that C.all D.that all It is true___he said surprised us all A.what B.that C.that what D.what that What am I for you； What is you for me.nothing ,that is all. ( )he wants to say is ( )he missed the bus.A.that,that B.all,that C.what,that D.all what,what what is all what is all about To be a doctor is I wanted to be中填all that还是all what, that is all right! OK.That is all. 翻译：is that all? that is all It is that all?