听短文填空。 1. First of all, joining a _________ is a good choice. 2. If you want to be a volunteer, you can call __________ from Monday to Friday. 3. 'Meeting a New Family' offers you a chance to live with a family for a __________ time. 4. In the summer camp, you can __________ in different games, speech contests and so on. 5. The test is mainly about the __________ for the summer vacation.