【正确答案】 D

【答案解析】[听力原文] 14-16
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 tile words "How To". One book may tell you how to earn more money, another 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 Make Yourself into Trouble. There is even a book about how to take your own life.
[解析] 本题为推断题。在文章开头部分，可以听到“'How To' books are very popular”，并且涉及生活的各个方面，也就是该类书适合众多读者。因此选项D正确。

【正确答案】 A

【答案解析】[解析] 本题为细节题。在短文第三段第一句可听到“One of the most popular types of books is one that helps people with their private problems”. 由此可判断出，关于“personal problems”的书最受欢迎。