It is one of the greatest mysteries of nature. In case you haven’t noticed, all living things follow very definite, individual rhythms, all as regular as a clock, but what makes them regular?
Though many scientists maintain that these rhythms are the result of some outside force like gravity or radiation or both, the results of most scientific researches agree with other scientists who believe that each living thing has its own built-in biological “time clock.”
Take the mystery of migration for example. Scientists can’t really explain why many species of birds migrate in the autumn even though the temperature is still summery. The birds just seem to snub the comfortable weather that they are having. When a certain time comes, they travel south by the thousand. In spring time, they migrate northwards even though there probably is snow still covering the ground when they finally arrive. Something said “go,” and they did.
Animals that hibernate (冬眠) are obeying individual time clocks, too. When their clock indicates the time to take a winter’s nap, they do, and nothing can stop them. At a certain time in the spring, they wake up and come out regardless of the weather outside.
Plants appear to have yearly rhythms, such as the sprouting of seeds, and they also have daily rhythms. Notice sometimes that plants raise their leaves in daylight and lower them at night.
If you live along the California coast, you can easily observe a demonstration of this mysterious clock functioning regularly. There, from February to September, the highest tides occur exactly every fourteen and four-fifths days, and during these high tides, but at no other time, small silvery fish called grunions surf-ride a wave to the beach. There the female deposits her eggs in the sand and the male fertilizes them; then both hitch a wave-ride back to the sea. Exactly fourteen and four-fifths days later, never before or after, the tiny eggs hatch, and the high tide carries the new babies out to sea.
72. According to the passage, the mysterious rhythms result from ______.
A. the influence of gravity on living species
B. the effect of radiation on living species
C. the influence of a mysterious outer force on living species
D. the internal mechanism inside the living species
73. The underlined word “snub” in the third paragraph probably means ______.
A. fight B. ignore C. symbolize D. criticize
74. Which of the following statements is NOT TRUE?
A. Hibernating animals are obeying an internal time clock.
B. The positioning of the leaves of some plants is due to the daily rhythms.
C. The internal clock functioning is demonstrated in the reproducing habits of grunions.
D. The yearly hibernation is more because of the weather influence than the biological functioning.
75. The passage is mainly about ______.
A. the rhythms of life
B. the reasons of mysterious hibernation
C. strange behaviors of species
D. the timing for different events in the world of species
A super drug that could remove Alzheimer’s (老年痴呆症)，heart disease and diabetes (糖尿病) and help people live to 100 is being developed by scientists. Their research is based on the identification of three genes that help prolong lives and prevent diseases which occur in old age. Medically controlling the proteins made by the “ longevity genes” will allow millions to live longer, predicts Dr Nir Barzilai.
Those whose DNA strongly features the three genes are 80 percent less likely to develop Alzheimer’s. The genes also fight against the deadly impact of smoking, poor diet, obesity and lack of exercise.
Already, several laboratories are working on a pill to imitate the benefits of the genes and Dr Barzilai thinks it could be tested within three years. The pill could remove some diseases that damage old age. “ The advantage of finding a gene that involves longevity is that we can develop a drug that will imitate exactly what this gene is doing,” he said.
Of the three longevity genes, two genes increase the production of so-called good cholesterol(胆固醇), which reduces the risk of heart disease. The third prevents diabetes. They were discovered by Dr Barzilai’s team while studying the DNA of 500 Ashkenazi Jews with an average age of 100. The chances of living that long are one in 10,000 but the group, which shared relatively few common ancestors, was 20 times more likely to hit the entury. Dr Barzilai said: “ 30 percent of them were obese or overweight and 30 percent smoked two acks of cigarettes a day for more than 40 years, however they can live to 100.”
But Andrew Ketteringham of the Alzheimer’s Society said: “Alzheimer’s disease, a most common disease, is likely to be caused by a combination of genetic disosition(遗传倾向), lifestyles and life events. Many genes are probably involved. Some people are able to live to 100 years because of ______.
| A．a magical medicine | B．three special genes | C．good living habits | D．longevity proteins |
Why does the discovery of the longevity genes mean a lot?
| A．Because it can bring great benefits to scientific labs. |
| B．Because it can help people change their unhealthy genes |
| C．Because it helps produce a drug that can make people live longer. |
| D．Because it will help scientists build up a new branch of biology. |
From Paragraph 4 we can infer that ________.
| A．longevity genes can create good cholesterol. |
| B．the volunteers share some common ancestors |
| C．bad habits are likely to have no effect on the volunteers |
| D．longevity genes protect the volunteers against bad habits |
What is Andrew Ketteringham’s attitude toward the study?
| A．Positive | B．Negative | C．Critical | D．Cautious |
The church seems cold this morning, even after all the people, friends and family, fill the benches. I sit here in silence, in shock and denial. This was not supposed to happen. What about our dreams, or our plans? We were going to raise our children, travel the world, and grow old together. I’m only 37, a typical housewife. I don’t know if I can do all this alone—two children, no father. What do I do or say?
The faces of so many people confuse me as they come to pay their last respects. Some have real sorrow; I can see it in their eyes. The others seem to just say, “I told you so.” Those famous last words: I-told-you-so. How I can’t stand them. And the pointing fingers as so-called family and so-called friends pick me out of the crowd for others to see. I want to scream and wake up but I can’t do anything but sit there. How can they be so blind? I fell in love with a man. Love knows no boundaries .
He was a good man, hardworking, caring and kind. He was retired from the Navy and a gentleman. He was sensitive to others’ needs, the kind of man that knew what to do or say, how to humor any situation and calm everyone’s fears. I remember our first child was a big surprise to both of us. I remember when I told him the news. He fell off his chair, saying over and over in disbelief, “But I’m almost sixty.” After a few months he started planning our next and even doing his famous little dance whenever he discussed the idea.
A man, thirty years older than I, lies in a coffin. Flowers, the American flag and his VFW comrades surround him, paying tribute（颂词）to him as the man he really was. And I sit alone here, with our two children, in silence, praying that this cold morning at church is only a nightmare and I will awake to his loving arms again.What can we know from the passage about the writer?
| A．She married a man much older than she. |
| B．She is going to give birth to their second child. |
| C．She lost her husband, who was as old as she. |
| D．She lost her father, whom she loved deeply. |
From Paragraph Two, we can see ______.
| A．the writer didn’t really love the man |
| B．some of her family members didn’t understand her |
| C．some of her family members and friends were blind |
| D．she thought her marriage to the man was a mistake |
Which of the following can best replace the underlined words “But I’m almost sixty”?
| A．I can’t believe it. |
| B．That’s a lot of trouble. |
| C．That should have happened long ago. |
| D．It can’t be my child. |
Which of the following can’t be used to describe the writer’s feelings for the man?
| A．Sad. | B．Loving. | C．Inseparable | D．Complaining. |
In recent years, the world has made progress in reducing deaths among children under the age of five. A new report says an estimated 6.9 million children worldwide died before their fifth birthday. That compares to about twelve million in1990.
The report says child mortality rates have fallen in all areas. It says the number of deaths is down by at least 50 percent in eastern, western and southeastern Asia. The number also fell in North Africa, Latin America and the Caribbean.
Ties Boerma is head of the WHO’s Department of Health Statistics and Informatics. He says most child deaths happen in just a few areas.
TIES BOERMA: “Sub-Saharan Africa and southern Asia face the greatest challenges in child survival. More than eighty percent of child deaths in the world occur in these two regions. About half of child deaths occur in just five countries—India, which actually takes twenty-four percent of the global total; Nigeria, eleven percent; the Democratic Republic of Congo, seven percent; Pakistan, five percent and China, four percent of under-five deaths in the world.”
Ties Boerma notes that, in developed countries, one child in one hundred fifty-two dies before his or her fifth birthday. But south of the Sahara Desert, one out of nine children dies before the age of five. In Asia, the mortality rate is one in sixteen.
The report lists the top five causes of death among children under five worldwide. They are pneumonia, diarrhea, malaria and problems both before and during birth.
Tessa Wardlaw is with the U-N Children’s Fund. She is pleased with the progress being made in Sub-Saharan Africa. The area has the highest under-five mortality rate in the world. But she says the rate of decline in child deaths has more than doubled in Africa.
TESSA WARDLAW: “We welcome the widespread progress in child survival, but we importantly want to stress that there’s a lot of work that remains to be done. There’s unfinished business and the fact is that today on average, around nineteen thousand children are still dying every day from largely preventable causes.”
The World Health Organization says one way to solve these problems is to make sure health care services are available to women. In this way, medical problems can be avoided or treated when identified.Since 1990, the number of the children who died before 5 in the world has dropped by about__________.
| A．6,900,000 | B．12,000,000 | C．1,200,000 | D．5,100,000 |
What does the underlined word “mortality” ( in Paragraph 2)mean?
| A．illness | B．reduction | C．death | D．problem |
According to the passage, the readers are likely to believe that __________.
| A．child mortality rates have fallen just in five areas |
| B．Sub-Saharan Africa has the highest under-five mortality rate in the world |
| C．in developed countries, no children die before the age of five |
| D．the world has made little progress in reducing the rates of child mortality |
______ is the top-one cause of death among children under five worldwide.
| A．Global warming | B．Malaria | C．Pneumonia | D．Diarrhea |
What will be probably referred to in the following paragraph?
| A．Women do not want to have babies. |
| B．How more health care services are available to women. |
| C．Medical problems are completely solved. |
| D．The World Health Organization. |
This Mother’s Day will be the 8th year I have spent without my own mother. She passed away less than a month before Mother’s Day in the year 2000. She had been ill for almost two years, and I didn’t cry when she died, or at her funeral, but on that first Mother’s Day without her. On that day, I realized that this person I loved and depended on was gone forever.
She still lives in family memories, in the thoughts of her friends and co-workers, in the values she had instilled(灌输) in her children, and in the lovely flower gardens that she had so carefully tended.
She loved her gladioli and irises. Each fall she would dig the bulbs out of the soil and carefully wrap them in paper. The bulbs would be stored until the following spring when they would be replanted. It seemed like a lot of effort to me, but each year her flower garden was more glorious than the year before. She put the same hard work into caring for her family, instilling in her children a sense of justice and fair play, compassion, and strong moral values so that we blossomed.
Share anecdotes about your mother’s life at your Mother’s Day party. Too often, we avoid speaking of those loved ones who have passed away, fearful that we will unearth sad feelings. It doesn’t have to be that way. Sharing fond memories and stories of the life we shared with her can be a healing process that binds（捆绑）the family together.
My mother passed away when her oldest grandchild was only eight years old. Children will enjoy sharing pictures and stories of the grandmother they may have never known or have little memory of. Sharing anecdotes to pass on to the next generation will give children a feeling of family history and continuity, and may be one of the best ways to honor our mothers and grandmothers who have gone before us.What does the underlined words “passed away” ( in Paragraph 1)mean?
| A．died | B．continued | C．started | D．lasted |
On the first Mother’s Day after mum died the author realized_______ .
| A．mum had been dead for a long time | B．mum had suffered a lot from the illness |
| C．it was true that mum had been dead | D．it was impossible to depend on mum |
From the third paragraph we can infer that mum_______ .
| A．loved her gladioli and irises | B．showed kindness to all her children |
| C．taught the children to plant patiently | D．had a good influence on the author |
At the Mother’s Day party people don’t mention their lost mums only because_______ .
| A．they are simply afraid of causing sad feelings |
| B．they have forgotten their mums completely |
| C．they don’t love their mums any longer |
| D．they think their mums have passed away |
In order to show honor to our mothers and grandmothers we can _____ .
| A．spend the Mother’s Day with our children |
| B．share the stories of them with the children |
| C．hold the Mother’s Day party every year |
| D．plant beautiful flowers in the family garden |
Douglas Adams was born in Cambridge in March 1952, educated at Brentwood School, Essex and St John's College, Cambridge where, in 1974 he gained a BA (and later an MA) in English literature.
He was the creator of The Hitchhiker’s Guide to the Galaxy(《银河系漫游指南》), which started life as a BBC Radio 4 series in March 1978. Since then it has been transformed into a series of best-selling novels, a TV series, a record album, a computer game and several stage adaptations.
The Hitchhiker's Guide to the Galaxy's success sent the book straight to Number One in the UK Bestseller List and in 1984 Douglas Adams became the youngest author to be awarded a Golden Pan. He won a further two (a rare feat), and was nominated—though not selected - for the first Best of Young British Novelists awards.
He followed this success with The Restaurant at the End of the Universe (1980); Life, The Universe and Everything (1982); So Long and Thanks for all the Fish (1984); and Mostly Harmless (1992). The first two books in the Hitchhiker series were adapted into a 6-part television series, which was an immediate success when first showed in 1982. Other publications include Dirk Gently's Holistic Detective Agency (1987) and Long Dark Tea-time of the Soul (1988). In 1984 Douglas teamed up with John Lloyd and wrote The Meaning of Life and their second huge success, The Deeper Meaning of Life followed in 1990. One of Douglas’s personal favorites was written in 1990 when he teamed up with zoologist Mark Carwardine and wrote Last Chance to See an account of a world-wide search for rare and endangered species of animals.
Douglas sold over 15 million books in the UK, the US and Australia. He was also a best seller in German, Swedish and many other languages.
Douglas Adams died on Friday, May 11, 2001, in Santa Barbara, CA. He will be greatly missed by fans worldwide. The main idea of this passage is .
| A．Douglas Adams, always loved by fans |
| B．Douglas Adams and The Hitchhiker’s Guide to the Galaxy |
| C．Douglas Adams and his works |
| D．Douglas Adams’s personal lives |
The Hitchhiker’s Guide to the Galaxy was first shown to the public as .
| A．a radio series | B．a movie | C．a TV series | D．a computer game |
Which two books were adapted into a six-part TV series?
| A．Life, The Universe and Everything and Mostly Harmless |
| B．The Restaurant at the End of the Universe and Life, The Universe and Everything |
| C．The Restaurant at the End of the Universe and So Long and Thanks for all the Fish |
| D．So Long and Thanks for all the Fish and Mostly Harmless |
Last Chance to See is a book about .
| A．Some stories happening in a Dirk Gently's Holistic Detective Agency |
| B．the author’s personal favorites |
| C．a zoologist and his worldwide experiences |
| D．searching for rare and endangered species of animals |
Which of the following statement is not true?
| A．Douglas Adams died at the age of 49 and he was memorized by his fans. |
| B．Douglas Adams was the youngest author to be selected as one of the first Best of Young British Novelists. |
| C．John Lloyd was one of the authors of the two books, The Meaning of Lifeand The Deeper Meaning of Life. |
| D．Douglas graduated from Essex and St John's College and gained a Master’s Degree. |