If you have no special plans for your free time, why not spend your time helping others? Don't listen to people who say that young people today often think only of themselves. It is not true at all. More and more young people in the United States volunteer(,) to spend  their school  holidays  working for others. And they don't do it for money. Here are some of their stories. Alice Hamiton, 17 I'm going to help the Forest Centre build new hiking paths   in the mountains. It sounds terrible. I'll spend the whole summer living in a tent  and breathing the clean mountain air. I'm going to sleep under the stars. It will be nice, and I'll be able to do something good at the same time! Jason Moore 18 This summer, I'm going to volunteer with Special House Program.They build good,  low-cost houses and sell them to families that are not very rich. They'll teach me what to do, so I'll help people and also have a chance to learn how to build houses. Trish Anderson, 16 I'm going to teach kids who have trouble in reading. I'll work for a program called Reading For Life. Every day, I'm going to help kids choose and read books that they like. I want to be a teacher, and I love children and reading, so this is going to be a great experience for me. ,. From this passage, we know that Alice will volunteer  _  in summer.
to sleep under the stars to breathe the clean mountain air to live in a tent to help build new hiking paths in the mountain