I have two elder brothers.But my brothers have no brothers.Why?

I have two elder sisters.I是主语 have是谓语 sisters是宾语 two和elder是定语吗? I have two elder brothers.But my brothers have no brothers.Why? My ------sister is two years------ than I.A.older,older B.elder,elder C.older,elder D.elder,older my ( )sister is two years ( )than I.A.older elder.B.elder older.C.older.older.D.elder elder 为什么 翻译5.i have two sons.The elder son is four years older than the younger one. I have two elder brothers,______in the army for ten years.A the elder of whom servingB the older having servedC the older of which servedD the elder one has served为什么选B啊? I have two elder brothers,___in the army for ten years.A.the elder of whom served B.the older having served C.the older of which served D.the elder one has served只是不明白A项为什么不对 older brother 和elder brother有什么区别教科书原句I have two older brothers and one younger sister觉得不妥,表示哥哥应该说elder brother才对呀!做定语时他们到底怎么区别?原句补充：i have two older brothers and one I have two d____ I have two hand I have two grangfather My ( ) sister is two years ( ) than I.填older或elder. My brother is two years ______ than I.A older B elder 关于old的比较级使用问题!My ______ brother is two years ______ than I.A.older,older B.elder,older C.elder,elder既然old的比较级有elder和older2种,那么后面一个的填空,为什么选择b,不选择C?My elder brother is two years el I-------walk to school because my bike is bro-ken A.must B.can C.can‘t D.have to I Have Two Hands 歌词 i have two brothers,___ I have two _____[knife]