Do you have to buy this hatA.mustn't B.won't C.needn't D.don't need选哪个?为什么?

Do you have to buy this hatA.mustn't B.won't C.needn't D.don't need选哪个?为什么?
Do you have to buy this hat
A.mustn't B.won't C.needn't D.don't need
选哪个?为什么?

Do you have to buy this hatA.mustn't B.won't C.needn't D.don't need选哪个?为什么?
选C
have to 问句的否定回答是need not 这是固定的啊
比如说Must的否定回答也是need not 啊

选C；
mustn't表示“不准，不允许”；
won't表示“不会，不打算”；
根据句意“你非得买这个帽子吗？”，回答是“不是”；
而C和D都表示“我不需要”，再由句法结构应选情态动词，所以选C