A woman in the USA has a son, Ben. She is worried about ________. Because he is not doing well in school. Boys in his class play jokes on him because he seems so ________. The mother decides to help her son how to do something ________ in school. She tells him to go to the Public Library to ________ a book a week there and do a book report for her.

One day, in Ben’s class, the teacher picks up a rock and asks if（是否）________ knows it. Ben puts up his hand and the teacher lets him ________. “Why does Ben raise his hand?” All of his ________ whisper and wonder. “He ________ says anything. What will he want to say?” To their surprise（惊讶）, Ben ________ a lot about the rock. He can name other rocks in its group and even knows ________ the teacher finds it. The teacher and the ________ students are surprised. Ben learns this from doing one of his ________ reports.

Later Ben becomes the ________ student of his class. When he finishes high school, he goes to Yale University and at last ________ one of the best doctors in the United States.

After Ben grows up, he knows something about his mother that he doesn’t know as a ________. His mother never learns how to read.

A few years ago, my husband and I were on an island for a long holiday with our two little daughters. As we talked about what to do next, our daughters told us what they wanted to do. We agreed.

As soon as we walked into the butterfly（蝴蝶）museum, we saw thousands of beautiful butterflies. They all flew with their colourful wings. My girls were jumping up and down, and I knew we made the right decision（决定）to come to the museum. They were having so much fun.

I turned to our guide（导游）and asked, “How long do butterflies live?” She said, “For about ten days.”

“What can butterflies do in ten days?”

The guide stopped, looked at me and said, “They make the world a more beautiful place.” After we said goodbye, I thought about what the guide said. She was right. We all have something to offer（给予）the world with the time we have. If we spend the time doing many things for others, we all can make the world a better place.

Live like a butterfly. You can have your own way of making the world better.