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　　There was a woman in Detroit, who had two sons．She was worried about them, especially the younger one, Ben, 　　1　　 he was not doing well in school．Boys in his class made jokes about him because he seemed so 　　2　　．

　　The mother 　　3　　 that she herself would have to get her sons to do better in school．She told them to go to the Detroit Public Library to read a 　　4　　 a week and do a report about it for her．

　　One day, in Ben's 　　5　　, the teacher held up a rock and asked if anyone knew it．Ben put up his hand and the teacher let him 　　6　　．“Why did Ben put up his hand?” his classmates wondered．He 　　7　　 said anything．What would he possibly want to say?

　　Well Ben not only 　　8　　 the rock; he also said a lot about the rock．He named many other rocks in the same group and even knew 　　9　　 the teacher had found it．The teacher and the students were 　　10　　．Ben had learned all this from doing one of his book 　　11　　．

　　Later Ben went on to the 　　12　　 of his class．When he finished high school, he went to Yale University(耶鲁大学)and at last became one of the best doctors in the USA．After Ben grew up, he 　　13　　 something about his mother that he did not know as a 　　14　　．She, herself, had never learned how to 　　15　　．

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