根据提示用英语介绍20世纪杰出的女性之一:海伦.凯勒.

Helen Keller was an ordinary but great American woman,who was born in America on the sixth of June,1880.She was very optimistc about life,Although she became deaf and blind when she was only 19months old.She lived in a world of darkness and silence then,and communication with others seemed only a dream of her,However,she never gave up and struggled to live an active life.Under ,th guidance of her teacher ,Ms.Sullivan,Helen learned how to read and write and became a famous writer later.For a disabled person like her ,this was a wonder.