这道题目填doesn't it.
陈述部分的谓语动词是情态动词must时,反意疑问部分的助动词和情态动词要根据情况做出选择.
must表示必要性,反意疑问部分用needn't.
You must study hard,needn't you?
You must go home,needn't you?
mustn't表示不许,反意疑问部分用must.
You mustn't smoke here,must you?
must如果表示推测,即表示最大程度的肯定,不到百分之百时,情态动词和助动词的选择,要把情态动词must去掉后再来选,如：
They must have told him that,haven't they?
You must have seen the movie,didn't you?
这里的情态动词must表示的是推测,是最大程度的肯定,但不到百分之百,意思是“一定是……如何”,情态动词和助动词的选择,是把情态动词must去掉,句子变成It belongs to Zhang Hua,所以反意疑问句为doesn't it.
希望我能帮助你解疑释惑.