Penny

　　I have real problems getting to sleep at night. I do all the things you're supposed to do. But try as I might to get to sleep, I'll be turning for ages, then getting up to busy myself with different things to tire myself out. And then, when I do finally drop off, I tend to wake up at the slightest (最轻微的) sound and lie awake for hours worrying. I've tried all kinds of treatment, but none worked. I just can't remember when I last got a good night's sleep.

Amy

　　I'm normally so tired by the end of the day that I never have any problems dropping off. I'll sleep anywhere - in a hotel, on a plane, I can even sleep through a noisy party in the house next door, anything. All the same, I need a good eight hours' sleep to make me feel refreshed (精神焕发的) otherwise I tend to feel sleepy the next day.

Joe

　　I snore (打鼾) heavily. It drives my wife crazy, as she's a light sleeper. She'll move into another bedroom and then she'll complain the next day that she didn't get a good sleep. I've tried sleeping on my side but in spite of my efforts, none of it has done any good. My wife has asked me to lose weight - I don't believe it will make any difference, though.

21. What helps Pete to work well?

A. His scientific method.

B. Enough sleep at night.

C. His effective working hours.

D. A regular short sleep during the day.

22. What is wrong with Joe?

A. He is in poor health.

B. He always looks worried.

C. He has a weight problem.

D. He often fights with his wife.

23. Who is a light sleeper?

A. Penny.B. Pete.C. Amy.D. Joe.

24. In which part of a magazine could we find this text?

A. Arts.B. Jobs. C. Lifestyle.D. Education.