生态系统中的能量流动伴随着______．

阅读下面短文，根据短文内容，从方框中选出恰当的单词，将其正确形式填入短文空白处。（每词限用一次）

what, pull, another, with, some, found, still, decide, success, teacher

A professor(教授) told his students to go into the city slums(贫民窟) to study the life of 200 boys. He asked them to write reports about each boy’s 1ife and future. One of the students wrote, “They don’t have   小题1:   hope．”
Twenty-five years later，小题2:  professor read about the earlier study. He told his students to find out   小题3:   had happened to the boys. They tried very hard and   小题4:   that 176 of the boys had become successful as doctors, teachers and scientists.
The professor was very surprised and   小题5:  to study it further．Luckily, all of them were living near the place and he was able to ask each one, “What made you successful?” Each one answered, “It was a   小题6:  .”
The teacher was   小题7:  living there, so the professor found her and asked the old woman what she had done to   小题8:   those boys out of the slums, and change them into   小题9:  people.
The teacher’s eyes began to shine and said   小题10:   a sweet smile, “It’s really very easy. I love those boys.”