B. Offering some advice on sleeping problems.

C. Telling people how to exercise.

18. Why is it useless to keep turning around when you can't sleep?

A. It's tiring. B. It makes you worry. C. It increases heart rate.

19. Which of the following can cause sleeplessness?

A. Too much exercise in the evening.

B. Lack of sleep on weekends.

C. Eating cheese before going to bed.

20. What can we learn about sleeping pills?

A. They'll help relax. B. They make things worse. C. They are useful for sleeplessness.

第二部分 阅读理解 （共20小题；每小题2分，满分40分）

第一节（共15小题；每小题2分，满分30分）

Four of the World's Best Futurists(未来学家)

Kevin Kelly

　　Kevin Kelly is an author. His 1994 publication, Out of Control, discusses a future where machines and systems are so complex as to be indistinguished(难区分的) from living things.

　　His latest book What Technology Wants suggests that technology is not just a mixture of wires and metals but a living thing that has its own need. The book looks out through the eyes of this global technological system to discover what it wants.

Dr Michio Kaku

　　Dr Michio Kaku is a professor of theoretical physics at the City of New York and author of The Future of the Mind and Physics of the Future.

　　In The Future of the Mind , he explores the frontier of neuroscience. He predicts that one day we will be able to upload the human brain into a computer. In Physics of the Future, he predicts that glasses and contact lenses will be connected to the Internet and cars will become driverless with the power of the GPS system.

David Brin