one's hair long 还是have one's hair long?到底哪个正确?原题为：

one's hair long 还是have one's hair long?到底哪个正确?原题为：
My hair style doesn't follow the fashion,but I am used to___ my hair long.
A.having B.wearing C.growing up D.dressing
《美国传统词典》[双解]上有wear one's hair long 结构,可该题参考答案是A,为什么?爱词霸在线上有例句She used to wear her hair long.
她从前留着长发.我搞不懂答案有没有问题,或是有什么其它理由!