how big he is还是how large

how big he is还是how large i don't know how big/large he is how large is America how is big it How big is Beijing? How big is America How large is your bedroom? 选择正确的一项填空：How ( ) is your room? A.large B.big big,table,is,how,your【?】 How big is the room? how big is new york? 是How clever he is!还是What clever he is!