Choose the correct options

Read the dialogue and choose the correct forms.

Steve: Hi, Tom! How did you like our History class?

Tom: Hi, Steve. You know, I was impressed by the story of Helen Keller. Unfortunately, we didn't have time to finish her story. Do you know what happened next?

Steve: Yes, I searched for some information. When Helen was 7, her parents hired Ann Sullivan to take care of their daughter.

Tom: How [could|could have] she do it?

Steve: She was partly blind so she understood how to teach such children.

Tom: Does it mean that by means of the hand language, Helen and her teacher [weren't able|were able] to talk to each other?

Steve: Yes, I think so. It is also said that she [could|could have] read books which were printed for the blind.

Tom:[Was she able|Were she able] to speak?

Steve: Can you imagine? Yes! First she [could|couldn't] learn sounds and then she learned how to combine them into words.

Tom: That's amazing! Was it possible for her to enter college?

Steve: Yes. At the age of 20, she [was able|wasn't able] to pass entrance exams and later she did really well in her classes.