Choose the correct words. In the past, blind people(1) couldn39;t mustn39;t

Choose the correct words. In the past, blind people(1) couldn39;t mustn39;t read books other people(2) must had to read to them. That changed with the invention of Braille. Now, blind people(3) can have to read any book they want, so they(4) mustn39;t l don39;t have to depend on other people. They just(5) can39;t have to learn the Braille alphabet People who(6) can39;t must see well can also listen to audio books.