阅读下面的短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。

    Two months ago, there was a serious earthquake in my country. Many people were hurt and1their homes. In my school, we decided to organize a 5-kilometer run to collect money for the people. 2signed up for the run and asked their relatives and neighbors to support them. These people agreed to3some money—50 cents or a dollar, for example, for every kilometer that the students completed.

    Joe was my classmate. He was the4student in my class because he seldom did any exercise and he ate plenty of junk food. He never walked to school. He always took a bus. When he was asked5 he was going to take part in the run, he said he would think about it. A few students laughed and I think Joe felt embarrassed. I felt a bit sorry for6.

    The next day, as I was riding to school, I saw Joe walking in the street. I stopped and asked him why he was7. He said he was training to take part in the run. “Good for you, Joe!” I said.8, I told my friends about Joe. Most of them just laughed and said that they didn't think he would9the run. I wasn't sure, but I decided that I would10Joe. So, for the two weeks before the run, I was his trainer. He walked to school for a few11. Then he started to run slowly.

    On the day of the run, Joe lined up with the other students. The12began and soon Joe was left behind. Well, it took him hours to finish and he didn't expect to13the other students, but he tried to do his best. And14he completed the 5-kilometer run. Everyone was very15and said, “Well done, Joe!” What is more, Joe collected more money than any other student!