听力原文： In America today, books with suggestions on how to do things are very popular. There are about four to five thousand books with titles that begin with the words 'How To'. One book may tell you how to earn more money, mother may tell you how to save or spend it, and another may explain how to give your money away. Some 'How To'books tell you how to find a job and how to succeed at it. If you fail ,however,you can get a book called How to Turn Failure into Success. If you would like to become very rich, you can buy the book How to Make a Million. If you never make any money at all, you may need a book called How to Live on Nothing. One of the most popular types of books is one that helps people with their private problems. If you are unhappy with your life, you can read How to Love Every Minute of Your Life. If you are tired of books on happiness, you may prefer a book called How to Get Yourself in Trouble. There is even a book about how to take your own life. Why are ' How To 'books in great demand in the United States?