Plastic-Eating Worms
Humans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场), and up to 12 million tons pollute the oceans. So far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms.
Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms' chewing alone was not responsible for the polyethylene breakdown, the researchers made some worms into paste(糊状物) and applied it to plastic films. 14 hours later the films had lost 13% of their mass - apparently broken down by enzymes (酶) from the worms' stomachs. Their findings were published in Current Biologyin 2017.
Federica Bertocchini, co-author of the study, says the worms' ability to break down their everyday food - beeswax - also allows them to break down plastic. ＂Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well, ＂she explains, ＂The wax worm evolved a method or system to break this bond. ＂
Jennifer DeBruyn, a microbiologist at the University of Tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the worm itself or by its gut microbes(肠道微生物)?
Bertocchini agrees and hopes her team's findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process - not simply ＂millions of worms thrown on top of the plastic.＂
（1）What can we learn about the worms in the study?
| A． |
They take plastics as their everyday food. |
| B． |
They are newly evolved creatures. |
| C． |
They can consume plastics. |
| D． |
They wind up in landfills. |
（2）According to Jennifer DeBruyn, the next step of the study is to .
| A． |
identify other means of the breakdown |
| B． |
find out the source of the enzyme |
| C． |
confirm the research findings |
| D． |
increase the breakdown speed |
（3）It can be inferred from the last paragraph that the chemical might .
| A． |
help to raise worms |
| B． |
help make plastic bags |
| C． |
be used to clean the oceans |
| D． |
be produced in factories in future |
（4）What is the main purpose of the passage?
| A． |
To explain a study method on worms. |
| B． |
To introduce the diet of a special worm. |
| C． |
To present a way to break down plastics. |
| D． |
To propose new means to keep eco-balance. |
It is not unusual for people to speak two or three languages; they’re known as bilinguals or trilinguals. Speakers of more than three languages are known as polyglots. And when we refer to people who speak many languages, perhaps a dozen or more, we use the term hyper-polyglot.
The most famous hyper-polyglot was Giuseppe Mezzofanti, a 19th century Italian cardinal, who was said to speak 72 languages. This claim sounds absurd. If you assume each language had 20,000 words, Mezzofanti would have to learn a word a minute, six hours a day, for eleven years—an impossible task. But Mezzofanti was tested by critics, and they were all impressed.
Did Mezzofanti have an extraordinary brain? Or are hyper-polyglots just ordinary people with ordinary brains who manage to do something extraordinary through hard work?
U.S. linguist Stephen Drashen believes that outstanding language learners just work harder at it and then they acquire unusually strong language ability. As an example, he mentions a Hungarian woman who worked as an interpreter during the 20th century. When she was 86, she could speak 16 languages and was still working on learning new languages. She said she learned them mostly on her own, reading fiction or working through dictionaries or textbooks.
Some researchers argue to the contrary. They believe that there is such a thing as a talent for learning languages. In the 1930s, a German scientist examined parts of the preserved brain of a hyper-polyglot named Emil Krebs, who could speak 60 languages fluently. The scientist found that the area of Krebs’s brain called Broca’s area, which is associated with language, looked different from the Broca’s area in the brains of men who speak only one language. However, we still don’t know if Krebs was born with a brain ready to learn dozens of languages or if his brain adapted to the demands he put on it.
Although it is still not clear whether the ability to learn many languages is in born, there’s no doubt that just about all of us can acquire skills in a second, third, or even fourth language by putting our mind to it. What does the underlined sentence imply?
| A．Mezzofanti could remember 360 words a day. |
| B．Mezzofanti had a special way to learn languages. |
| C．Mezzofanti’s achievement was ridiculous. |
| D．Mezzofanti language ability was astonishing. |
The Hungarian woman became a hyper-polyglot mainly because of her __.
| A．good memory | B．unique brain | C．hard work | D．learning methods |
The German scientist’s findings showed that Krebs ___.
| A．had an unusual brain |
| B．was born with great talent |
| C．had worked hard at languages |
| D．expected too much of himself |
The author seems to agree that ___.
| A．it is not hard to learn foreign languages |
| B．hard work plays a part in language learning |
| C．there is no such thing as a talent for languages |
| D．hyper-polyglots have an inborn talent for language |
Two traveling angels stopped to spend the night in the home of a wealthy family. The family was rude and refused to let the angels stay in the guest room. Instead the angels were given a space in the cold basement. As they made their bed on the hard floor, the older angel saw a hole in the wall and repaired it. When the younger angel asked why, the older angel replied: Things aren’t always what they seem.
The next night the pair came to rest at the house of a very poor, but very hospitable(好客的)farmer and his wife. After sharing what little food they had，the couple let the angels sleep in their bed where they could have a good night’s rest. When the sun came up the next morning，the angels found the farmer and his wife in tears. Their only cow, whose milk had been their only income, lay dead in the field.
The younger angel was very angry and asked the older angel, “How could this happen?” “Why did you not watch out for the cow? The first man had everything, yet you watched over his house,” she accused. “The second family had little but was willing to share everything, and you did not help.”
“Things aren’t always what they seem,” the older angel replied. “When we stayed in the basement，I noticed there was gold stored in that hole in the wall. Since the owner was so greedy and unwilling to share his good fortune，I asked God if I could seal(封口) the wall so he wouldn’t find it. Then last night as we slept in the farmer’s bed，the angel of death(死神) came for his wife. I asked God if the angel could take the cow instead. Things aren’t always what they seem.”The underlined part “the pair” in the second paragraph two refers to .
| A．the poor couple | B．the rich couple | C．the angels | D．the guests |
The younger angel was very angry because .
| A．the older angel killed the farmer’s cow |
| B．the older angel treated the two families unfairly |
| C．the wealthy man gave them a bad place to live |
| D．the angel of death took the cow away |
Why did the older angel let the farmer’s cow die?
| A．Because God wanted the older angel to take the cow. |
| B．Because she wanted to teach the younger angel a lesson. |
| C．Because she was sympathetic to the rich. |
| D．Because she wanted to save the farmer’s wife. |
The story tries to tell the reader that .
| A．sometimes things are not what they seem |
| B．angels are always ready to help the poor |
| C．angels are always ready to help the rich |
| D．the young should always learn from the old |
I met him first in 1936. I rushed into his ugly little shop to have the heels of my shoes repaired. I waited when he did it. He greeted me with a cheerful smile. “You’re new in this neighborbood, aren’t you?”
I said I was. I had moved into a house at the end of the street only a week before.
“This is a fine neighborhood,” he said. “You’ll be happy here.” He looked at the leather covering the heel sadly. It was worn through because I had failed to have the repair done a month before. I grew impatient, for I was rushing to meet a friend. “Please hurry,” I begged.
He looked at me over his spectacles. “Now, lady, we won’t be long. I want to do a good job. You see, I have a tradition to live up to.”
A tradition? In this ugly little shop that was no different from so many other shoe repair shops on the side streets of New York?
He must have felt my surprise, for he smiled as he went on. “Yes, lady, I inherited a tradition. My father and my grandfather were shoemakers in Italy, and they were the best. My father always told me, ‘Son, do the best job on every shoe that comes into the shop, and be proud of your fine work. Do that always, and you’ll have both happiness and money enough to live on.’”
As he handed me the finished shoes, he said: “These will last a long time. I’ve used good leather.”
I left in a hurry. But I had a warm and grateful feeling. On my way home I passed the little shop again. There he was, still working. He saw me, and to my surprise he waved and smiled. This was the beginning of our friendship. It was a friendship that came to mean more and more to me as time passed.
Every day I passed his shop, we waved to each other in friendly greeting. At first I went in only when I had repair work to be done. Then I found myself going in every few days just to talk with him.
He was the happiest man I’ve ever known. Often, as he stood in his shopwindow, working at a pair of shoes, he sang in a high, clear Italian voice. The Italians in our neighborhood called him la luce alla finestra—“the light in the window”.
One day I was disappointed and angry because of poor jobs some painters had done for me. I went into his shop for comfort. He let me go on talking angrily about the poor work and carelessness of present-day workmen. “They had no pride in their work,” I said. “They just wanted to collect their money for doing nothing.”
He agreed. “There’s a lot of that kind around, but maybe we should not blame them. Maybe their fathers had no pride in their work. That’s hard on a boy. It keeps him from learning something important.” He waited a minute and said “Every man or woman who hasn’t inherited a prideful tradition must start building one.”
“In this country, our freedom lets each of us make his own contribution. We must make it a good contribution. No matter what sort of work a man does, if he gives it his best each day, he’s starting a tradition for his children to live up to. And he is making lots of happiness for himself.”
I went to Europe for a few months. When I returned, there was no “light in the window”. The door was closed. There was a little sign: “Call for shoes at shop next door.” I learned the old man had suddenly got sick and died two weeks before
I went away with a heavy heart. I would miss him. But he had left me something—an important piece of wisdom I shall always remember: “If you inherited a prideful tradition, you must carry it on; if you haven’t, start building one now.” The shoemaker looked sadly at the shoes because __________
| A．they were of poor quality. |
| B．he didn’t have the right kind of leather |
| C．he thought they were too worn to be repaired |
| D．the author hadn’t taken good care of them. |
The author was surprised when she heard that the shop had a tradition because the shop ________.
| A．looked no different from other shoe repair shops |
| B．had a light in the window |
| C．was at the end of a street |
| D．was quite an ugly and dirty one |
What does the underlined word “inherit” mean in paragraph 6 mean?
| A．develop | B．receive | C．learn | D．appreciate |
The author later frequently went into the little shop __________.
| A．to repair her worn shoes |
| B．only to chat with the shoemaker |
| C．to look at the new shoes there |
| D．only to get comfort from the shoemaker |
Why was the shoemaker called “the light in the window” by his neighbors?
| A．Because he always worked late at night. |
| B．Because he always put a light in the window. |
| C．Because he was always guiding the others. |
| D．Because he was always happy and cheerful. |
What’s the best title of this passage?
| A．A Proud Shoemaker | B．A Prideful Tradition |
| C．The Light in the Window | D．Treasure Your Shoes |
Mom was right! If you say thank you, for even the smallest gift or slightest show of kindness, you’ll feel happy.
Gratitude, says Robert A. Emmons, a professor of psychology at the University of California, is an important element of happiness. In his recent book, Thanks!, Emmons uses the first major study on gratitude to prove mom’s point.
As one of the leading scholars of the positive psychology movement, he admits gratitude may be difficult to express. He advises you to begin by admitting that life is good and full of events and elements that make daily existence a wonder. Second, recognize that the source of life’s goodness is more than just you. That source may be your mom, a friend, partner, child, colleague at work or play.
Gratitude is always other-directed, notes Emmons. You can be pleased or angry with yourself and feel guilty about doing something wrong, but you can never be grateful to or for yourself.
Expressing gratitude shouldn’t be a reaction; it should be a state of mind. To feel grateful when life is a breeze and you have more than you need is easy. To feel grateful in time of crisis—anger, hatred and bitterness—is easier. Also, too many people are aware of life’s blessings only after these are lost.
It’s crisis and chaos—danger, disease, disability and death—that bring many individuals to realize just how dependent they are on others. Yet it’s the way each of us begins life and ends it. It’s too bad that so many people waste those decades in between laboring under the illusion(幻觉) they are self-sufficient, says Emmons.
The abundance of voices expressing gratitude from his studies of individuals with chronic health problems is many. But Emmons goes beyond his “groundbreaking” science to make his case for gratitude by including the inspirational writings of philosophers, novelists and saints, as well as the beliefs of various religious and their respective scripture(经文). Taken together, these observations are summed up quite nicely by famous humanist Albert Schweitzer, who said the secret of life is “giving thanks for everything”.
To enable and embrace gratitude, Emmons encourages the readers of Thanks! to keep a gratitude diary. He even provides easy-to-follow directions on how to practise and develop gratitude.
I’m not a reader or advocate of self-help books, but I am thankful for the reference I found in a newspaper article to the research Emmons was conducting on gratitude involving organ donors and recipients. The chance discovery led me to this book.
Mom implied that kindness seems to find its way back to the giver because life really is all about giving, receiving and repaying. So I’ll pay attention to her professional advice and say: Thank you, professor Emmons. . What is the text mainly discussed?
| A．There are many ways of being thankful. |
| B．Gratitude is important to happiness. |
| C．Mom is great for her being thankful. |
| D．Being thankful will keep you fit. |
. The author mentions Robert A. Emmons’ book Thanks! in order to prove that __________.
A. Professor Emmons supports mom’s study on psychology.
B. mom is as great a psychologist as Professor Emmons.
C. Professor Emmons is a famous psychologist.
D. mom is right about her viewpoint on gratitude.. It will be easier for you to feel grateful when___________.
| A．you live a comfortable life |
| B．you receive gifts on your birthday |
| C．you get help during your hard times |
| D．you are congratulated on your success |
What is the opinion of Professor Emmons?
| A．It is enough to thank others orally |
| B．Whether you are thankful is always up to you |
| C．Remember to be thankful anytime and anywhere |
| D．It is easier to be thankful for yourself than for others. |
In the writer’s opinion, Emmon’s book Thanks! On gratitude is________.
| A．one-side | B．reasonable | C．puzzling | D．helpful |
Have you ever considered all the English expressions that include words about clothes? Let’s see if I can name a few proverbs “off the cuff” since I haven’t prepared for it.
| English expressions with “pants” |
| People wear pants to cover the lower part of their bodies. We sometimes say that people who are restless or nervous have “ants in their pants.” They might also “fly by the seat of their pants” -- they use their natural sense to do something instead of their learned knowledge. Sometimes, people may “get caught with their pants down” -- they are found doing something they should not be doing. And, in every family, one person takes control. Sometimes a wife tells her husband what to do. Then we say “she wears the pants in the family.” |
| When people want to say something about money |
| Pants usually have pockets to hold things. Money that is likely to be spent quickly can “burn a hole in your pocket.” Sometimes you need a belt to hold up your pants. If you have less money than usual, you may have to “tighten your belt” -- you may have to live on less money and spend your money carefully. But once you have succeeded in budgeting your money, you will have that skill “under your belt.” I always praise people who can save their money and not spend too much. I really “take my hat off to them.” Yet, when it comes to my own money, I spend it “at the drop of a hat” -- immediately, without waiting. And sadly, you cannot “pull money out of a hat” -- you cannot get money by inventing or imagining it. |
| English expressions with “shoes” |
| Boots are a heavy or strong kind of shoes. People who are “too big for their boots” think they are more important than they really are. I dislike such people. I really do. You can bet your boots on that! Yet, truly important people are hard to replace. Rarely can you “fill their shoes” -- or replace them with someone equally effective. |
| English expressions with “shirt” |
| My father is an important person. He runs a big company. He wears a suit and tie and a shirt with sleeves that cover his arms. Some people who do not know him well think he is too firm and severe. They think he is a real “stuffed shirt.” But I know that my father “wears his heart on his sleeve” -- he shows his feelings openly. And, he knows how to “keep his shirt on” -- he stays calm and never gets angry or too excited. |
. What is this passage mainly about?
| A．How to say English correctly and properly. |
| B．Why English expressions include words about clothes. |
| C．Which words can be used to describe my father. |
| D．What people mean when they use some proverbs. |
. Which of the following proverbs are not related to money?
| A．tighten one’s belt | B．burn a hole in one’s pocket |
| C．get caught with their pants down | D．take one’s hat off to them |
. Tim often considers himself the most important person in the world, which is far from the truth. We may say __________.
| A．he is “too big for their boots”. | B．he “bet his boots on that”. |
| C．he “fill their shoes”. | D．he “wears his heart on his sleeve”. |
If you want to praise somebody for his calmness when facing danger, you may say__________.
| A．“You really fill your shoes.” |
| B．“Awesome! You wear your heart on your sleeve!” |
| C．“Amazing! How can you keep your shirt on at that time!” |
| D．“Cool! You are truly a stuffed shirt”. |
粤公网安备 44130202000953号