将下列城市代表的自治区与我国少数民族聚集区及相应歌曲一一对应起来。

①拉萨                     A 回族           a一条条巨龙翻山越岭，为雪域高原送来安康

②银川                    B 藏族           b天山南北好牧场，戈壁沙滩变良田

③南宁                    C壮族            c 蓝蓝的天空……奔驰的骏马洁白的羊群

④呼和浩特               D维吾尔族        d 山歌好比春江水，不怕滩险弯又多

⑤乌鲁木齐               E 蒙古族          e宁夏川两头尖，天下黄河复宁夏

The little boy didn't know _______. [ ]

A. Which hat is his

B. which hat his is

C. which hat was his

D. which hat his was