I have a long hair ____ a ponytail.中为什么填in?

I have a long hair ____ a ponytail.中为什么填in? I have a long hair ____ a ponytail. Look!_____Millie _____(have)long hair in a ponytail i have black hair in a ponytail同义句转换 I will w___my hair in a ponytail. 那have hair in a ponytail什么意思 按要求改写下列句子1、Sandy has long hair in a ponytail.(改为一般疑问句并作肯定回答) ------Mille ------(have)long hair in a pouytail. 按要求改写下列句子Sandy has long hair in a ponytail 改写为一般疑问句并作肯定回答___ I have black hair in a p_______ I have a long hair 可以这样讲吗? Lisa and I have long hair,but my hair is longer than ( ).A:S