56.Johnny frequently left home because

A.he preferred to stay alone        B.he enjoyed seeing new places

C.he couldn’t do well at school     D.he didn’t get along well with his parents

57.People around Johnny

A.tried to stop him froIli slipping away   B.kept following him to get him back

C.booked tickets for him if necessary     D.were clear about how he travelled abroad

58.From the passage，we can learn that

A.Johnny worked for a daily paper

B.Johnny lacked a sense of adventure

C.Johnny went exploring along the Amazon River

D.Johnny went to Brazil two months after he finished school

B

Editor Henry Slocum，

I read your May 10th article in the local newspaper Honesdale Times about electronic books，or e-books，with great interest.You made several good points about the disadvantages of e-books.You may have overlooked，however，some of the ways in which they are superior to traditional books.Yes，e-books are expensive，but they are also convenient.In addition，due to their environment-friendly nature, e-books have the potential to change our planet for the better.

E-books, for anyone who is unfamiliar with the term，are about the same size and shape as regular books.They have a large screen in the middle，however.This screen shows the reader a  page of text that has been downloaded from a computer.Once the reader has finished reading the  page on the e-book screen.he or she scrolls down to see a new page.The process continues until the entire book has been read.

As you pointed out.Mr.Slocum，it's great to lie on a warm，sandy beach with a book.You can do that just as easily with an e-book as you can with a traditional paper book.In fact，because e-books are so light, you can carry them anywhere.Say，for example，that you like to read on the bus.Which would you rather carry with you-a heavy 800-page novel，or an e-book that weighs only a few ounces?

Another important advantage is offered by e-books as well.They are more environmentfriendly than traditional books.At present，thousands of trees are cut down each year to meet the publishing industry’s demand for paper.Books that don’t sell are eventually returned to the Dublisher and destroyed.This terrible waste could be avoided if everyone used e-books，which require no paper.

Sincerely，

David Eng

David Eng

59.What does Editor Henry Slocum think about e-books?

A.Interesting. B.Expensive.  C.Convenient   D.Environment-friendly.

60.What is mainly talked about in Paragraph 2 ?

A.What an e-book is.

B.Why e-books are popular.

C.How e-books have developed.

D.Who are the readers of e-books.

61.In David’s letter, he thinks that

A.E-books will come down in price

B.E-books come in various sizes and shapes

C.E-books do little harm to the environment

D.E-books are no better than traditional books

62.The main purpose of the letter is to

A.explain how to read e-books

B.honor the person who invented e-books

C.scold publishers for wasting so much paper

D.provide evidence that e-books are a good idea

C

Losing weight comes with a lot of health benefits-including making your brain sharper.

Yes，it turns out that overweight may damage cognitive functions such as memory and attention.There have been few studies of overweight and cognitive functioning，possibly because it is generally believed that it is not a primary risk cause for poor cognitive performance.Losing weight，therefore，may help improve these mental functions，according to a new research led by John Gunstad，assistant professor of psychology at Kent State University.

Growing evidence suggests that being fat is linked to cognitive deficits(缺陷).So Gunstad and his team guessed that losing weight might improve mental function.For their study，they measured memory and attention in a group of l 50 overweight participants，some of whom had some kind of operation for weight loss and some did not.All of the volunteers completed mental skills tests to assess their abilities of memory and attention at the beginning of the study，and again 12 weeks later.To begin with.about 24%of the patients showed damaged learning and 23%showed signs of poor memory when tested.At the end of the study，those who had lost weight after operation improved their scores into the average or above average range for cognitive functions.Scores for the volunteers who didn’t lose weight dropped even further.

The study helped Gunstad to find out whether losing weight had any effect on mental function.Now that he’s seen the positive effect that weight loss can have on memory and attention，he says he will next study those who choose to lose weight by the traditional way-eating healthier and getting more active.He expects that losing weight in this way will have a similarly positive effect on the brain.“If we can improve the condition with operations，then we can probably produce the same change with behavioral weight loss as well，’’he says.

63.There is less research on overweight and cognitive functions because researchers

A.believe overweight only affects our body

B.have focused on ways to sharpen people’s mind

C.do not consider overweight a main cause for low cognitive ability

D.are clear about the relation between weight and mental functions

64.The result of Gunstad’s study shows that

A.losing weight has little effect on people’s memory

B.losing weight can improve people’s mental functions

C.overweight people are likely to have psychology problems

D.overweight people’s abilities of concentration differ greatly

65.What is Gunstad planning to prove next in his research?

A.Slim people are smarter than overweight people.

B.Healthy diet is better than exercise in losing weight.

C.Traditional ways of losing weight are better than operation

D.Overweight people will get smarter by taking more exercise.

66.Which of the following is the best title for the text?

A.Body Weight and Health            B.Losing Weight by Operation

C.Ways to Improve Mental Functions    D.Losing Weight to Sharpen Your Mind