A、She was once blind when she was very young. B、She was a deaf-mute teacher from Boston. C、She taught Helen Keller by using fing

Helen Keller suffered from a strange sickness when she was only 19 months old. It made her completely blind and deaf. Five years later, a teacher—Anne Sullivan—arrived from Boston to help her.(23)She taught her how to use her hands as a way of speaking. Miss Sullivan took Helen out into the woods to explore nature.(23)She explained everything in the language she and Helen used—a language of touch—of fingers and hands. Miss Sullivan stayed with Helen for many years. She taught Helen how to read, how to write and how to speak. She helped her to get ready for school and college.(24)In time, Helen did go to college and completed her studies with high honors. But it was a hard struggle. Few of the books she needed were written in the Braille language that the blind could read by touching pages. Miss Sullivan and others had to teach her what was in these books by forming words in her hands. The study of geometry and physics was especially difficult. Helen could only learn about squares, triangles by making them with wires. She kept feeling the different shapes of these wires until she could see them in her mind. All of Helen Keller’s knowledge reached her mind through her sense of touch and smell, and of course her feelings.(25)When she spoke, her face looked very alive. It helped give meaning to her words. After she finished college, she spoke to many groups around the country. She wrote several books. Her main goal was to increase public interest in the difficulties of people with physical problems.
23. What can we learn about Miss Sullivan according to the passage?
24. Why was college life difficult for Helen Keller?
25. What helped the other people understand Helen Keller’s meaning?