1. (2017八下·上虞期中) B）根据所给汉语意思及文章内容，写出单词的正确形式。
    Helping people who are in need is a very（重要的）part of the American way of life. Many high schools ask their students to spend a certain number of hours（志愿活 动）every year. So how do you go about it? If you like animals, help out at a local animal shelter. Most shelters （依靠）on volunteers to make the cats and dogs （更高兴）. If you think you may be （感兴趣）in politics, volunteering to help with a campaign（竞选活动）is a great way to find out how things work-whether it's for the president of the United States or your city's mayor（市长）. If you have a friend or relative who has a （健康）problem such as a cancer（癌症）, you might donate （捐助）some of your time to help  an organization or（提供）other help to people with the same（疾病）. You also can serve food at a（无家可归的）shelter; volunteer to（花费）time at a retirement community; take part in a park clean-up day. The possibilities are endless!