Helen Keller was born in America in June, 1880. Everything was all right when she was born. But when she was 19 months old, an attack of fever left her blind and deaf for the rest of her life. She was so young when she became blind that as she grew older she did not remember being able to see; and she became deaf before she had any idea of the importance of human speech. She lived in darkness and silence. As she grew older, she, too, wanted to express her ideas and feelings. But she realized she was cut off from others. Her parents were greatly worried. How could anyone make touch with Helen's mind and intelligence in darkness and silence without speech? Helen was nearly seven before a teacher was found. Her name was Miss Sullivan. Miss Sullivan had a lot of difficulties in teaching Helen Keller. As the child could neither see nor hear, she had to use manual alphabet. But Helen's energy and intelligence and strong spirit as well as Miss Sullivan's skill and patience, overcame all the difficulties. As Helen grew up, she became an able student, passed examination and finally took a university degree in English literature. She then devoted all herself to helping the blind and the deaf. Her personal success, together with the work she had done for others, made her one of the greatest women in modern times. She wrote many books and "The Story of My Life"is a wonderful one. Helen was finally successful mainly because of  _  .
her parents' help the manual alphabet Miss Sullivan used in teaching her the help she got when she was studying for a university degree her hard work, cleverness and will-power as well as Sullivan's great efforts