In the past,when people had problems,they went to their families or friends to get advice.Today it is possible to get advice from radio shows.TV programs or telephone hot lines,too.A hot line is a telephone line that offers a direct way of getting in touch with advicers.Most hot lines are completely anonymous --callers do not have to say their names or telephone numbers.Most hot lines are usually free,too.Callers do not have to pay for their advice or the phone calls--even if the calls are long distance.At some hot lines,the advicers are volunteers.Other hot lines pay their advicers for their work.Usually the advicers are full-job people with years of education and experience,but sometimes the advicers have only taken a short class before starting to work on the hot line.All the advicers listen to the people and help them solve their problems. When people call the hot line advicers,they  _  .
often give their names and telephone numbers generally have to pay for the long distance calls usually pay nothing for most of the calls and advice always try to get in touch with the volunteer advicers