Which letter is most useful to a deaf woman?

.Which letter is the most hardworking one?的翻译 Which letter is most useful to a deaf woman? Which letter is missing? Which letter is a which letter is drink? which letter is for Which letter is ‘you’? which letter is inscert? Which letter is the most important thing in the world?Why? which letter is the most important to a blind woman?智力问答... 脑筋急转弯Which letter is most usefui to a derf woman? which letter is the most useful to a man A：A；B：I；C：H Which letter is an insect? Which letter is an insect which letter is for drink? which letter is not me? Which letter is an insect? which letter is a question?