Books which give instructions on how to do things are popular in the United States today. Thousands of these “how to” books are available. In fact, ________________________________.

Many “how to” books give advice on careers. They tell you how to choose a career and how to succeed in it. Many of these books help people to use their free time better. _________________________. Other people use their free time to make repairs and improvements on their homes. They prefer books which give step-by-step instructions on how to repair things like plumbing and electrical wiring or on how to redecorate or enlarge a house.
Why have “how to” books become so popular? __________________________________.  Today people have far more free to use, more choices to make, and more problems to solve, “how to” books help people to deal with modern life.

Useful words and Expressions:
step-by-step 按部就班的
redecorate 重新装饰，再装饰
complex 复杂的，综合的

答案：

(1)there are about for thousand books with titles that begin with the words “how to’.
(2)Some people want book which will give them useful information about sports, hobbies and travel
(3)Probably because life has become more complex.