I have two eldr brother .but mybrothers have no brother .why?

I have two eldr brother .but mybrothers have no brother .why? I have two d____ I have two hand I have two grangfather I Have Two Hands 歌词 i have two brothers,___ I have two _____[knife] I have two ____________.( knife) I like cars.I have two Sharp brot I have two cakes between meals对two提问 I have two brothers.（对two提问） I have two apples for dinner就“two提问 I have music class ( )two hours. I have two books 改为一般疑问句 I have two more bananas同义句 I have two eggs —breakfast I have two bananas 改成一般疑问句