How old are your brothers 为什么填your?

How old are your brothers 为什么填your? how old your cousin brothers?中间填什么 Are these your brothers? How old are your parents?如何回答 How old are your twin brother? How old are your teacher什么意思 how old are you可以改成how are your How old is your mother?还是应该are your mother? How old are your brother这个句子那错了 连词成句：old,are,how,your,parents. 用old,are,how,your,parents连词成句 How old are your brother那错了