题目内容：

People who don't wear the seat-belt ___ to drive after january 1st
A.don't allow B.isn't allowed C.mustn't be allowed D.mustn't allow

优质解答

C.mustn't be allowed

追问：

请解释一下，谢谢！

追答：

先要看题干
主语是“没系安全带的人”， 下文是“在元月一号以后开车”
根据安全常识也应该知道是“绝对不（被）允许”的意思， 表被动