用所给词的适当形式填空

I think books can make people ________. (happy)

As is known to all, waste has become a more and more serious problem. We can easily see many people throw a lot of food into the garbage can. Some people spend thousands of yuan buying fashionable clothes. What do you think of them? Here are some of students’ opinions:

     If you have no special plans for your holidays, why not be a volunteer with us? Being a volunteer, you don’t think only of         . You work, and you don’t get money.         your helping hands can make both others and yourself happy. More and more young people are ready to           us. Let’s share some of their stories and plans.
Mary, 17
I visited the forest park with Mr Cao last week. I found there were not enough         there. I’m going to help the Forest Centre build new hiking paths in the mountains. It’s going to be great           —I’ll spend seven days living in a forest and enjoying the clean mountain air. I’m going to           with friends in the day and then sleep under the moon and stars. It will be a nice sport, and I’ll be able to do         good at the same time.
Andy, 18
This summer, I’m going to volunteer with Loving Pets Program. I         my neighbours’ pets last summer. And I fell in love with dogs and cats. This summer, I will work in the         centre and         my kindness and love to more pets. I am sure to make friends with more       !
Haitao, 16
Some children find reading         . They have problems with reading. They need our help. I’ll work for a       called Reading for Life. Every day, I’m going to help them choose and read books            they like. I want to be a          when I grow up, and I love children and reading, so this experience will help me in many ways.