which lettle is the most useful for blind man?怎么回答?

问题描述:

which lettle is the most useful for blind man?
怎么回答?

哪一个字母(或者哪一封信)对盲人是最有用的?

哪一个是对盲人最有用的?blind man 盲人 is the most useful 是最有用的