Đáp án: 24)once 25)a 26)in 27)must 28) benefits 29) ideas 30)loseLời giải:                                Have your voice!
Do you wish you had a place to hang out with other young people in your town or city? Well, maybe you should tell your local council. (24) once started, they may know of a place where you can meet people of your age. In (25) a city council asked for suggestions on a site that could be used (26) in a central point. (27) Must at least you can do the same thing and create (28) benefits
 to the lives of others. It's important not to have (29) ideas about dates, so first find out what people your age want. And you should keep them informed of the progress so they don't (30) lose                                                                                                                              interest.