we are not allowed to touch it,we touch it A mustn't Bmustn't to C haven't tO 选哪个为什么

问题描述:

we are not allowed to touch it,we touch it A mustn't Bmustn't to C haven't tO 选哪个为什么

a
我们不被允许触摸它。等于 我们不能触摸它。就是mustn't啦,它是情态动词,直接接动词原形,前面不加to的

选A ,前半句已表明是不能碰那个东西的了,不选B,是因为must是情态动词,不能接to ,就想can一样作为情态动词,后面不能加to,至于C,haven't to 这种表达方式是错误的,可以说doesn't have to /don't have to ,