频率副词的用法English is ------ too difficult for me.I can't learn

always ：总是,一直.用在句中有烦恼意味,能表达说话人的一种情绪.例：He always gets back very late and disturbs me.usually ：通常.用在句中似乎说有时候英语对我来说却不难,出现了特殊情况.两者进行比较,仔细研读揣摩,C项比D项更适合.