求求大家了!帮帮忙吧!在线等! helen keller is a ___for blind people.填空

求求大家了!帮帮忙吧!在线等! helen keller is a ___for blind people.填空
原文：helen keller was a very unhappy child .then one day her teacher worte the word "water" in her hand .she put helen's hand in some water .helen said water. now she was happy.she could read and speak .she could talk to her parents .they could write in her hand.
按原文内容填词第四个字母是e，一共五个字母