In the past, when people had problems, they went to their family or friends to get advice. Today it is possible to get advice from radio shows, TV programs and telephone hot lines, too. A hot line is a telephone line that offers a direct way of getting in touch with advisers. 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 the advice or the phone calls―even if the calls are long distance. At some hot lines, the advisers are volunteers. Other hot lines pay their advisers for their work. Usually the advisers are full-job people with years of education and experience, but sometimes, the advisers have only taken a short class before starting to work on the hot line. All the advisers listen to people and help them solve their problems.

53. What does the word “anonymous” mean in Chinese?

54. What do people usually pay for most of the calls and advice?（不超过3个单词）

55. Who listen to people and help callers solve their problems? （不超过3个单词）