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For well over a thousand years，smallpox was a disease that everyone feared．The disease killed much of the native population in South America when the Spanish arrived there in the early sixteenth century．By the end of the eighteenth century，smallpox was responsible for about one in
ten deaths around the world．Those who survived the disease were left with ugly scars on their sjun．
It had long been well known among farmers that people who worked with cows seldom caught smallpox；instead，they often caught a similar but much milder disease called cowpox (牛痘) ．A Bridsh doctor called Jenner was extremely interested in this，and so he studied cowpox He believed that，by vaccinating (给接种疫苗) people with the disease，he could protect them against the much worse disease smallpox．In 1796，he vaccinated a boy with cowpox and，two months later，with smallpox．The boy did not get smallpox．In the next two years，Jenner vaccinated several children in the same way，and none of them got the disease．
News of the success of Jenner’s work soon spread．Vaccination soon became a common method to protect people against other diseases caused by virus，such as rable (狂犬病)，and vaccines (疫苗) were sent across the world to the United States and India．
It took nearly two centuries to achieve Jenner’s dream of getting free of smallpox from the whole world．In 1967，the world Health Organization (WHO) started a great vaccination program，and the last known case of smallpox was recorded in Somalia in 1977．The story of vaccinations does not end there，however．There are many other diseases that kill more and more people every year．Besides，many new diseases are being discovered．The challenge for medical researchers will，therefore，probably continue for several more centuries
1.Smallpox was so serious that by the end of l8th century
A．its death rate was up to ten percent
B．those who caught it were certain to die
C．one in ten people in the world died of smallpox
D．one in ten deaths in the world was caused by smallpox
2.Edward Jenner discovered that vaccination with cowpox could
A．make smallpox much milder
B．stop people from getting smallpox
C．protect people against any disease
D．prevent people’s scars after smallpox
3.Which of the following statements is not true?
A．The first experiment with cowpox was made by a British doctor
B．After 1977 smallpox disappeared around the world according to WHO．
C．Vaccination had existed among ordinary farmers before being discovered
D．Vaccination can be used to protect people in the world against not only smallpox
4.The author of the passage thinks that
A．vaccinations bring many new problems
B．vaccinations end the spread of diseases
C．there is a long way to go to fight against diseases
D．there is along way to go to discover new diseases
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For well over a thousand years，smallpox was a disease that everyone feared．The disease killed much of the native population in South America when the Spanish arrived there in the early sixteenth century．By the end of the eighteenth century，smallpox was responsible for about one in
ten deaths around the world．Those who survived the disease were left with ugly scars on their sjun．
It had long been well known among farmers that people who worked with cows seldom caught smallpox；instead，they often caught a similar but much milder disease called cowpox (牛痘) ．A Bridsh doctor called Jenner was extremely interested in this，and so he studied cowpox He believed that，by vaccinating (给接种疫苗) people with the disease，he could protect them against the much worse disease smallpox．In 1796，he vaccinated a boy with cowpox and，two months later，with smallpox．The boy did not get smallpox．In the next two years，Jenner vaccinated several children in the same way，and none of them got the disease．
News of the success of Jenner’s work soon spread．Vaccination soon became a common method to protect people against other diseases caused by virus，such as rable (狂犬病)，and vaccines (疫苗) were sent across the world to the United States and India．
It took nearly two centuries to achieve Jenner’s dream of getting free of smallpox from the whole world．In 1967，the world Health Organization (WHO) started a great vaccination program，and the last known case of smallpox was recorded in Somalia in 1977．The story of vaccinations does not end there，however．There are many other diseases that kill more and more people every year．Besides，many new diseases are being discovered．The challenge for medical researchers will，therefore，probably continue for several more centuries
Smallpox was so serious that by the end of l8th century
A．its death rate was up to ten percent
B．those who caught it were certain to die
C．one in ten people in the world died of smallpox
D．one in ten deaths in the world was caused by smallpox
Edward Jenner discovered that vaccination with cowpox could
A．make smallpox much milder
B．stop people from getting smallpox
C．protect people against any disease
D．prevent people’s scars after smallpox
Which of the following statements is not true?
A．The first experiment with cowpox was made by a British doctor
B．After 1977 smallpox disappeared around the world according to WHO．
C．Vaccination had existed among ordinary farmers before being discovered
D．Vaccination can be used to protect people in the world against not only smallpox
The author of the passage thinks that
A．vaccinations bring many new problems
B．vaccinations end the spread of diseases
C．there is a long way to go to fight against diseases
D．there is along way to go to discover new diseases
查看习题详情和答案>>Sydney—A shark savaged a schoolboy’s leg while he was surfing with his father at a beach in Sydney on February 23. It was the third shark attack along the coast of Australia’s largest city in a month.
The 15yearold boy and his father were in the water off Avalon, on Sydney’s northern beaches, around dawn when he was attacked. The city’s beaches are packed with locals and tourists during the summer months.
“The father heard a scream and turned to see his son thrashing (激烈扭动) about in the water,” police said. “Fortunately, the shark swam away and the boy was helped to the shore by his father.”
Lifesaving Club spokesman Nick Miller said, “It got him around the top of his left leg and the father came and dragged him out of water.” He said the boy was bleeding heavily when he was brought to the shore. “There was a lot of pain, as you can imagine.” The teenager was airlifted to hospital for treatment for leg injuries.
Police said the bites “cut through to the bone”, but the boy did not appear to have sustained any fractures (骨折). He was in a stable condition now.
Several beaches were closed after the attack. Water police and lifeguards were searching for the shark, while police hoped to identify its species by the shape of the bite marks. But they said it was too early to say what type of shark attacked the boy. “I don’t even know if he saw it,” Miller said.
Many shark species live in the waters off Sydney’s beaches, but attacks on humans are still relatively rare. However, there were two attacks on successive days earlier this month, one on a navy diver in Sydney harbor，not far from the famous Opera House, and the other on a surfer at the city’s worldfamous Bondi beach.
Fishermen say shark numbers are on the rise. There is a ban on commercial fishing in the harbor, which has increased fish stocks. Marine experts also claim environmental protection has created a cleaner environment, attracting sharks closer to the shore as they chase fish. Many shark species, including the Great White—the maneaters made famous in Steven Spielberg’s Jaws—are protected in Australian waters.
1.The report mainly tells us________.
A．shark attacks on humans are on the rise
B．sharks attacked humans three times in one month
C．a boy was attacked by a shark at a Sydney beach
D．shark numbers are increasing in the waters off Sydney’s beaches
2. The underlined word “savaged” in the first paragraph probably means “_____”.
A．attracted B．dragged C．bit D．packed
3. What do we know about the city of Sydney from the passage?
A．It is one of the largest cities in Australia.
B．Sydney harbor is not far from the famous Opera House.
C．There are many locals and tourists on its coast all the year round.
D．There are few shark species in the waters off Sydney’s beaches.
4. About the injury of the boy we know that________.
A．he was losing much blood when he was dragged out
B．he was very nervous when he was sent to hospital
C．he may be in danger of losing his leg
D．he was injured in the right leg
5. All the following are the causes of Australia’s sharks’ increasing except that___.
A．environmental protection has created a cleaner environment
B．a ban on commercial fishing has increased fish numbers
C．many shark species are protected in Australian waters
D．the film Jaws has made the Great White famous
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A long time ago, a little boy loved to play around an apple tree. After eating some apples, he took a nap under the (1)_______. He and the tree loved each other. When the boy grew up, he(2)_______ played around the tree.
One day, the boy came back to the (3)_______. The tree (4)_______ the boy to play with him. “I am no longer a kid, I don’t play around trees any more." The boy replied, "I want (5)_______. I need money to buy them." "Sorry, but I don’t have money, but you can sell all my apples and have money to buy." The boy was so (6)_______ that he picked all the apples and (7)_______ happily. The boy never came back after he picked the apples. The tree was (8)_______.
Later, the boy needed a house for (9)_______, so he turned to the tree. And the tree asked himto cut off all his branches. So the boy did. The tree was glad to see him happy but the boy never came back since then. The tree was again (10)_______and sad.
1. A. sunshine B. screen C. shadow D. shelf
2. A. no longer B. no more C. no farther D. no better
3. A. top B. area C. tree D. village
4. A. asked B. told C. inspired D. added
5. A. pleasure B. help C. toys D. fruits
6. A. shamed B. excited C. embarrassed D. trouble
7. A. played B. sang C. sold D. left
8. A. sad B. happy C. concerned D. forgettable
9. A. shelter B. sale C. example D. preparation
10. A. angry B. lovely C. friendly D. lonely
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A boy and his father were walking in the mountains. Suddenly the boy fell, hurt himself, and cried, “AAAhhhhhhhh!!!” To his surprise, he heard the voice repeating, somewhere in the mountain, “AAAhhhhhhhh!!!” Then the boy cried again, “Who are you?” He received the answer “Who are you?” He thought someone else in the mountain was making fun of him, so he got angry and shouted “Foolish!” He received the answer “Foolish!”
He looked at his father and asked, “What’s going on?” The father smiled and said, “My son, listen.” And then he shouted to the mountain, “I love you!” The voice answered, “I love you!” Again the man cried, “You’re the best!” The voice answered, “You’re the best!”
The boy was surprised, but did not understand. Then the father explained, “People call this ‘Echo’, but really this is life. It gives you back everything you say or do. Our life is just a reflection（反映）of what we have done. If you want more love in the world, have more love in your heart. If you want to be successful, work hard. This can be used in everything in life. Life will give you back everything you have given to it.”
1. At first the boy cried because __________.
A. he fell and hurt himself B. he wanted to give himself a surprise
C. he got angry with his father D. he hoped his father would help him
2. When the boy heard the voice repeating, he thought __________.
A. it was foolish to hear other’s voice
B. someone else in the mountain liked his voice
C. he was laughed at by someone else in the mountain
D. there were many people in the mountain
3. The word “Echo” means __________.
A. life itself B. repeating voice C. love in the world D. everything in life
4. We can infer from the story that __________.
A. the boy didn’t like his father at all B. the boy did not understand what his father said
C. people will get everything back D. the father had his own way to teach his son
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