问题描述：
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a professor told his students to go into the city slums to study the life of200boys.he asked them to（ ）reports about each boy's life and future.every one of the students wrote,he doesn't have any hope
Twenty-Five years （ ）,another professor read about the earlier study.he told his students to（ ）what had happened to the boys.they tried very hard and found that 176 of the boys had become successful（ ）doctors,teachers and scientists
The professor was very （ ）and decided to study it further.Lckily ,allthe men were living near the place and he was able to ask each one.What made you（ each one answered,therewas a good teacher.
The teacher was（ ）living there,so the professor found her and asked the old woman（ ）she had used to pull those boys（ ）the slum,and change them into successful people.
The teacher's （ ）began to shine and said with a sweet smile.It's really very easy.I lovedthose boys
a professor told his students to go into the city slums to study the life of200boys.he asked them to（ ）reports about each boy's life and future.every one of the students wrote,he doesn't have any hope
Twenty-Five years （ ）,another professor read about the earlier study.he told his students to（ ）what had happened to the boys.they tried very hard and found that 176 of the boys had become successful（ ）doctors,teachers and scientists
The professor was very （ ）and decided to study it further.Lckily ,allthe men were living near the place and he was able to ask each one.What made you（ each one answered,therewas a good teacher.
The teacher was（ ）living there,so the professor found her and asked the old woman（ ）she had used to pull those boys（ ）the slum,and change them into successful people.
The teacher's （ ）began to shine and said with a sweet smile.It's really very easy.I lovedthose boys
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