Harvard researchers have created a tough, low-cost, biodegradable(可生物降解的)material inspired by insects’ hard outer shells. The material’s inventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic. The material, made from shrimp(虾)shells and proteins produced from silk, is called “shrilk”. It is thin, clean, flexible and strong.
A major benefit of the material is its biodegradability. Plastic’s toughness and flexibility represented a revolution in materials science during the 1950s and 1960s. Decades later, however, plastic’s very durability(耐用性) is raising questions about how appropriate it is for one-time products such as plastic bags, or short-lived consumer goods, used in the home for a few years and then cast into a landfill where they will degrade for centuries. What is the point of making something that lasts 1,000 years?
Shrilk not only will degrade in a landfill, but its basic components are used as fertilizer(肥料), and so will enrich the soil.
Shrilk has great potential, the inventors said. Materials from which it is made are plentiful in nature, found in everything ranging from shrimp shells, insect bodies to living plants. That makes shrilk low-cost, and its mass production possible should it be used for products demanding a lot of material.
Work on shrilk is continuing in the lab. The invertors said the material becomes flexible when wet, so they’re also developing simpler production processes, which could be used for non-medical products, like for computer cases and other products inside the home. They’re even exploring combining it with other materials, like carbon fibers, to give it new properties.Paragraph 1 of the passage is mainly about shrilk’s _____.
remarkable design
interesting name
major features
basic elementsWhat has become a concern about plastic?
Using it properly.
Producing it cheaply.
Developing its properties quickly.
Evaluating its contributions fairly.According to the inventors, shrilk has great potential partly because _____.
it can help plastic degrade
it can be found in living things
its mass production has been realized
its raw materials are abundant in natureWhat are the inventors doing in the lab?
Replacing carbon fibers with shrilk.
Testing shrilk’s use in wet conditions.
Making shrilk out of used household goods.
Improving shrilk’s flexibility for medical purposes.Which of the following can be the best title for the passage?
Recent Progress in Environmental Protection
Benefits of Insects in Scientific Research
The Harm of One-time Products
A Possible Alternative to Plastic
Many facts suggest that children are overweight and the situation is getting worse, according to the doctors. I feel there are a number of reasons for this.
Some people blame the fact that we are surrounded by shops selling unhealthy, fatty foods, such as fried chicken and ice cream, at low prices. This has turned out a whole generation of grown-ups who seldom cook a meal for themselves. If there were fewer of these restaurants, then probably children would buy less take-away food.
There is another argument that blames parents for allowing their children to become overweight. I agree with this, because good eating habits begin early in life, long before children start to visit fast food shops. If children are given fried chicken and chocolate rather than healthy food, or are always allowed to choose what they eat, they will go for sweet and salty foods every time, and this will carry on throughout their lives.
There is a third reason for this situation. Children these days take very little exercise. They do not walk to school. When they get home, they sit in front of the television or their computers and play computer games. Not only is this an unhealthy pastime, it also gives them time to eat more unhealthy food. What they need is to go outside and play active games or sports.
The above are the main reasons for this problem, and therefore we have to encourage young people to be more active, as well as steer them away from fast food shops and bad eating habits.According to the text, what kind of children may eat more unhealthy food?
| A．Those who often take exercise. |
| B．Those who often watch television. |
| C．Those who often have meals at home. |
| D．Those who often walk to school. |
The author thinks that children are becoming overweight because ．
| A．their parents often cook meals for them |
| B．they are too busy to go out and play |
| C．they can' t choose what to eat |
| D．there are too many fast food shops around |
The word "steer" underlined in the last sentence most probably means .
| A．force | B．guide |
| C．expect | D．observe |
The main purpose of the text is to .
| A．tell a story | B．provide facts |
| C．give advice | D．compare opinions |
It was a cold December and Mrs. Bell wanted to do a lot of shopping. She waited until it was Saturday, when her husband was free, and she took him to the shops with her to pay for everything and to carry for her what she had bought. They went to a lot of shops, and Mrs. Bell bought everything she could think of.
She often stopped and said, “Look, Peter! Isn’t that beautiful?
“All right, my dear. How much is it?” answered Mr. Bell, and then he took money out to buy it for her.
It was almost dark when they came out of the last shop, and Mr. Bell was tired. He was thinking about a nice drink by the side of a warm fire home. Suddenly his wife looked up at the sky and said, “Look at that beautiful moon, Peter!”
Without stopping, Mr. Bell answered at once. “All right, dear. How much is it?” Then he took his wallet out of his pocket.Mrs. Bell took her husband to the shops because ．
| A．he liked beautiful things |
| B．he liked to do shopping too. |
| C．she wanted him to pay money |
| D．he was always free |
Mrs. Bell bought in the shops.
| A．nothing | B．a drink |
| C．the most beautiful thing | D．a number of things |
Mr. Bell shopping.
| A．was addicted to | B．was thinking about |
| C．was tired of | D．was very interested in |
According to the last paragraph, we know Mr. Bell .
| A．wanted to buy the moon |
| B．did not really know what his wife was saying |
| C．was a millionaire |
| D．did not like the idea of buying the moon |
Ask any student to say one thing they know about Charles Dickens, and it is very likely they will say Oliver Twist. His classic tale of a poor orphan boy strikes at the heart of all those who have ever wanted "more", as Oliver did.
And now, Dickens' classic scenes of the lives of the Victorian British poor will appear in a big screen movie, "Oliver Twist," an adaptation of his classic tale directed by Roman Polanski.
The new film is not meant for younger viewers, and is meant for children over 13. For those old enough to enjoy it, however, the film shows just how long people have been enjoying Dickens' remarkable literature. His short stories and essays began appearing in magazines in 1833. "Oliver Twist" was published in 1837 - more than 165 years ago.
"Oliver Twist" tells the story of an orphan forced to live in a workhouse headed by the awful Mr Bumble, who cheats the boys who work there out of their already low pay. Oliver decides to escape to the streets of London, where he meets a thief called Fagin, played by Sir Ben Kingsley, who leads him into a world of crime. Several of Dickens' books have been made into films and television series, including 2002's "Nicholas Nickleby" and 2000's "David Copperfield." And several versions of "A Christmas Carol" have entertained audiences for years.
In his novels, Dickens wrote about several important issues. He talked about the Poor Law Amendment Act of 1824 in "Oliver Twist"; the French Revolution in "A Tale of Two Cities"; and helping the poor in "Hard Times.” One of Dickens' best-known books is the first Christmas book he wrote - "A Christmas Carol" (1843), about a mean man.
We thought this would be a good time to take a look at the man behind the words and see what kind of experiences helped shape and affect one of the best — known writers of all time.The “workhouse” in paragraph 4 should be ___
| A．a building where people are kept as a punishment for a crime they have committed |
| B．a place where dancing is taught or trained for international performance |
| C．a building where very poor people were sent to live and given work to do |
| D．a place where films are made or music is recorded |
How many works are mentioned in the passage?
A. 3 B. 4 C 5 D. 6The passage show many things about Oliver except that____
| A．he is forced to live in a workhouse by Roman Polanski |
| B．he meets a thief, Fagin, in the streets of London |
| C．he lives a hard life in his childhood |
| D．Fagin trains and forces Oliver to do some crimes |
The fifth paragraph mainly tells us ___
| A．Dickens’s birth and schooling |
| B．Dickens’s work experience |
| C．Dickens’s works and themes |
| D．Dickens’s influence and contribution |
In America, square dancing has been the most popular form of folk dancing since the early days. In early times, when men and women worked in groups to build a barn (谷仓) or harvest crops, they danced when the work was done. The music came from the violin for the most part, but if there was no one to play a musical instrument, clapping was used to produce the rhythm to which people dance. The early settlers danced in a store, in a barn, or in a farm kitchen.
A square is formed by four couples （对）who stand facing the centre of the square. Each couple stand on one side of the square, the boy on the left and the girl on the right.
The caller is an important part of the dance, since he tells the dancers which steps to do. If the dancers do not know the steps, he teaches them. It takes time to learn to be a good caller, and good callers are always in demand（被需要）.
These are the names of some of the steps the dancers do: Form a square; Circle; Honour your partner; Swing your partner; Form a star. There are many more. As the callers tell the dancers what to do next, they move to form the pattern（图形）he calls.
Large or small numbers of people can dance at one time. Sometimes 800 or 1,000 people may be dancing at the same time. Or there may be only one square of eight people.
Special clothes are worn by some when dancing. This makes the dance more colourful to watch. The special clothes are different from place to place. Women often wear full skirts of various colours with a pretty blouse. Men have coloured shirts and western trousers that they wear only when square dancing. In some country areas, everyone wears his best clothes.
Today in some parts of the United States you will find some schools, clubs, or groups square dancing for fun.From the passage we know that square dancing came from_______.
| A．the clubs | B．the schools |
| C．big cities | D．the countryside |
How many steps do the dancers usually do while square dancing?
| A．At most four. | B．At least one thousand. |
| C．At most eight. | D．At least five. |
For what purpose do the American men and women dance?
| A．For money. |
| B．To lose weight. |
| C．For fun. |
| D．To show their beautiful clothes. |
If 800 people dance at the same time，how many squares can be formed?
| A．200 squares. | B．100 squares. |
| C．400 squares. | D．One big square. |
Halloween falls on October 31st, the last day of the Celtic calendar. Halloween was referred to as All Hallows Eve and dates back to over 2000 years ago.
The American tradition of "trick-or-treating" probably dates back to the early All Souls' Day marches in England. During the festivities, poor citizens would beg for food and families would give them pastries called "soul cakes" in return for their promise to pray（祈祷）for the family's dead relatives.
The act of giving out soul cakes was encouraged by the church as a way to replace the ancient practice of leaving food and wine for homeless ghosts. The practice, which was referred to as "going a-souling" was finally taken up by children who would visit the houses in their neighborhood and be given sweets, food, and money.
The tradition of dressing in costume（服饰） for Halloween has both European and Celtic roots. Hundreds of years ago, winter was an uncertain and frightening time. Food supplies were often not enough because people were afraid of the darkness and would stay at home without doing businesses.
On Halloween, when it was believed that ghosts came back to the earthly world, people thought that they would meet with ghosts if they left their homes. To avoid being recognized by these ghosts, people would wear masks when they left their homes after dark so that the ghosts would mistake them for their fellows(同伴).
On Halloween, to keep ghosts away from their houses, people would place bowls of food outside their homes to satisfy the ghosts and prevent them from trying to enter their houses.Halloween is a day_______.
| A．respecting the old |
| B．pleasing the children |
| C．honoring the dead |
| D．praying for relatives |
Which of the following statements is false about Halloween?
| A．Halloween has a long history. |
| B．Children can get a lot of gifts. |
| C．Americans created the festival. |
| D．People were afraid of darkness. |
Ancient people would wear masks on Halloween in order to______.
| A．frighten the ghosts | B．leave their homes |
| C．enjoy themselves | D．look like ghosts |
The best title for the passage is___________.
| A．Halloween Traditions | B．American Traditions |
| C．Ancient Church Practices | D．Halloween Costumes |