Farmers use different kinds of soil conservation methods to protect their land from damage by farmin——青夏教育精英家教网—

Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature . One important form of soil conservation is the use of windbreaks . Windbreaks are barriers formed by trees and other plants with many leaves . Farmers plant them in lines around their fields .

Windbreaks stop the wind from blowing soil away . They also keep the wind from destroying or damaging crops . They are very important for growing grains , such as wheat . There have been studies done on windbreaks in parts of West Africa , for example . These found that grain harvests can be twenty percent higher in fields protected by windbreaks compared to fields without such protection .

However , windbreaks seem to work best when they allow a little wind to pass through . If the wall of trees and plants stops wind completely , then violent air motions will take place close to the ground . These motions will lift soil into the air where it will be blown away .

For this reason , a windbreaks is best if it has only sixty to eighty percent of the trees and plants needed to make a solid line . An easy role to remember is that windbreaks can protect areas up to ten times the height of the tallest trees in the windbreaks .

These should be at least two lines in each windbreak . One line should be large trees . The second line , right next to it , can be shorter trees and other plants with leaves . Locally grown trees and plants are best for windbreaks .

1.What is the best title for the passage?

A.Building a windbreak to protect soil	B.Building a windbreak to protect crops
C.Using a windbreak to improve grains	D.Using a windbreak to improve plants

2.In the fifth paragraph the author tells us windbreaks______.

A.do not work at all	B.do not stop wind fully
C.will not take place	D.will not allow wind to pass through

3.According to the passage , which of the following statement is wrong ?

A.Windbreaks are barriers .

B.Windbreaks can be used to make fences .

C.In general , there are two lines in all in every windbreak .

D.Windbreaks can protect areas .

—Stay a bit longer , please. It’s been such ______ fun having you here .

—Thank you , but I’ve got ______ early start tomorrow morning .

A./;the

B.a;an

C./;an

D.the;an

The teacher refused to have his daughter study in his class, ______ showing favour to her.

A.in need of	B.instead of
C.for fear of	D.regardless of

.He said that not until the heavy snow blocked the express ______ how serious the weather was.

A.did the villagers realize B.the villages realized

C.the villages did realize D.didn’t the villagers realize

“How could you lose so much money?” Charlie asked his wife, eyeing her angrily from _________the kitchen table.

A．at B．across C．through D．on

________reasonable, the idea he________to create a friendly environment attracted much public attention.

A．Sounded; came about B．Sounded; came across

C．Sounding; came up with D．Sounding; came along

Teenagers in England do many of the same things as children in America do . They enjoy sending messages on their mobile phones and they also like swimming , listening to the latest music , watching TV and surfing the Internet .

How do teenagers in England spend their free time and holidays ? Let’s follow Sally , a British teenager , and spend five days with her during her school holiday .

Day One	After breakfast , Sally’s mother went out and left her alone at home . She checked her mobile phone during lunch—one of her friends sent her a message early in the morning . Dinner was ready at 6:30 p.m. After that , she finished her English homework . Then she surfed the Internet .
Day Two	Sally and her mother paid a visit to their friends and went swimming together . Later , they wnet shopping for clothes and books , and had dinner in a restaurant .
Day Three	She went to the supermarket with her mother to buy fish and chips for lunch as well as some pens . After she got back home , she spent the next few hours surfing the Internet and watching TV .
Day Four	She surfed the Internet . Her mother took her out for lunch before going to work . She then read storybooks after lunch .
Day Five	She woke up at 2 p. m. , and so did her mother . They went to a park . Her mother met some friends there . When they got home , it was already time for dinner . Aterwards , she did her homework until 10 p. m.

1. When did Sally do her homework ?

A. In the morning . B. In the afternoon . C. At lunch time . D. In the evening .

2. Which of the following things did Sally do on Day Four ?

A. She went swimming . B. She went out for breakfast .

C. She read books . D. She went shopping .

3. How many times did Sally and her mother meet their friends during the five days ?

A. Once . B. Twice . C. Three times . D. Four times .

4. According to the passage , it can be inferred that__________.

A. a park is the best place to meet a friend

B. parents shouln’t leave teenagers alone at home

C. teenagers don’t usually do their homework during their school holidays

D. surfing the Internet has become an important part of teenagers’ lives

The twentieth century saw greater changes than any century before : changes for the better , changes for the worse ; changes that brought a lot of benefits to human beings , changes that put man in danger . Many things caused the changes , but , in my opinion , the most important was the progress in science .

Scientific research in physics and biology has vastly broadened our views . It has given us a deeper knowledge of the structure of matter and of the universe ; it has brought us a better understanding of the nature of life and of its continuous development . Technology in the application of science has made big advances that have benefited us in nearly every part of life .

The continuation of such activitites in the twenty-first century will result in even greater advantages to human beings : in pure science―a wider and deeper knowledge in all fields of learning ; in applied science―a more reasonable sharing of material benefits , and better protection of the environment .

Sadly , however , there is another side to the picture . The creativity of science has been employed in doing damage to mankind . The application of science and technology to the development and production of weapons of mass destruction has created a real danger to the continued existence of the human race on this planet . We have seen this happen in the case of nuclear weapons . Although their actual use has so far occurred only in the Second World War , the number of nuclear weapons that were produced and made ready for use was so large that if the weapons had actually been used , the result could have been the ruin of the human race , as well as of many kinds of animals .

William Shakespeare said , “ The web of our life is of a mingled yarn(纱线), good and ill together .” The above brief review of the application of only one part of human activities—science seems to prove what Shakespeare said . But does it have to be so ? Must the ill always go together with the good ? Are we biologically programmed for war ?

1. Which of the following best shows the stucture of the passage ?