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     (D)

    Malaria, the world's most widespread parasitic（寄生虫引起的）disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't （or can't） seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.

    Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect （感染）. They can also attach themselves to blood vessels in the brain. If it doesn't kill you, malaria can happen again and again for years. The disease passed on to humans by female mosquitoes infected with one of four species of parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth—and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.

    For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.

    76. According to paragraph 1, many people don't seek care because _______.

    A. they are too poor

    B. it is unusual to seek care

    C. they can remain unaffected for long

    D. there are too many people suffering from the disease

    77. People suffering from malaria _______.

    A. have to kill female mosquitoes      B. have ability to defend parasites

    C. have their red blood cells infected    D. have sudden fever, followed by chills

    78. Which of the following may be the reason for the wide spread of the disease?

    A. Its resistance to global warming.

    B. Its ability to pass on the virus frequently.

    C. Its outbreaks in cities with large populations.

    D. Its ability to defend itself and resist new drugs.

    79. It can be inferred from the passage that _______.            .

    A. no drugs have been found to treat the disease

    B. the alternative treatment is not easily available to most people

    C. malaria has developed its ability to resist parasites

    D. nobody knows what will be the drug to treat the disease

    80. Which of the following questions has NOT been discussed in the passage?

    A. How can we know one is suffering from malaria?

    B. How many people are killed by malaria each year?

    C. Why are there so many people suffering from malaria?

    D. What has been done to keep people unaffected for long?

    76--80   ACDBD  

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    (D)
    Malaria, the world's most widespread parasitic（寄生虫引起的）disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't （or can't） seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.
    Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect （感染）. They can also attach themselves to blood vessels in the brain. If it doesn't kill you, malaria can happen again and again for years. The disease passed on to humans by female mosquitoes infected with one of four species of parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth—and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.
    For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.
    76. According to paragraph 1, many people don't seek care because _______.
    A. they are too poor
    B. it is unusual to seek care
    C. they can remain unaffected for long
    D. there are too many people suffering from the disease
    77. People suffering from malaria _______.
    A. have to kill female mosquitoes      B. have ability to defend parasites
    C. have their red blood cells infected    D. have sudden fever, followed by chills
    78. Which of the following may be the reason for the wide spread of the disease?
    A. Its resistance to global warming.
    B. Its ability to pass on the virus frequently.
    C. Its outbreaks in cities with large populations.
    D. Its ability to defend itself and resist new drugs.
    79. It can be inferred from the passage that _______.            .
    A. no drugs have been found to treat the disease
    B. the alternative treatment is not easily available to most people
    C. malaria has developed its ability to resist parasites
    D. nobody knows what will be the drug to treat the disease
    80. Which of the following questions has NOT been discussed in the passage?
    A. How can we know one is suffering from malaria?
    B. How many people are killed by malaria each year?
    C. Why are there so many people suffering from malaria?
    D. What has been done to keep people unaffected for long?

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    1. 1.

      The following examples except ________ reflect man altering the balance of nature.

      1. A.
        man is covering huge areas with new kinds of plants
      2. B.
        man is facilitating the spread of animals into new regions.
      3. C.
        man is killing some species on a large scale
      4. D.
        man is getting to know the importance of keeping the balance of nature.
    2. 2.

      What had a piece of Canadian waterweed cause?

      1. A.
        Eastern Australian was overrun with forests.
      2. B.
        Half the waterways of Britain blocked for a decade.
      3. C.
        In parts of central Africa, the land reduced to a semidesert.
      4. D.
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    3. 3.

      What have spread diseases?

      1. A.
        Disease-sleeping sickness.
      2. B.
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      3. C.
        Improved communications.
      4. D.
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    4. 4.

      We make a nature sanctuary for rare birds but __________

      1. A.
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      2. B.
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      3. C.
        all bird multiply
      4. D.
        no bird multiply
    5. 5.

      The main idea of the passage is _________.

      1. A.
        that man is deliberately destroying the balance of nature
      2. B.
        that man has foreseen the consequences of altering the balance old nature
      3. C.
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      4. D.
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    Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect. They can also attach themselves to blood vessels in the brain. If it doesn’t kill you, malaria can happen again and again for years. The disease is passed on to humans by female mosquitoes infected with one of four species of a parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.

    For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.   

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    A. they are too poor                                       

    B. it is unusual to seek care

    C. they can remain unaffected for long

    D. there are too many people suffering from the disease

    68. People suffering from malaria ________.

    A. have to kill female mosquitoes                     B. have ability to defend parasites

    C. have their red blood cells infected                D. have sudden fever, followed by chills

    69. Which of the following may be the reason for the wide spread of the disease?

    A. Its resistance to global warming.                 

    B. Its ability to pass on the virus frequently.

    C. Its outbreaks in cities with large populations.

    D. Its ability to defend itself and resist new drugs.

    70. It can be inferred from the passage that ________.

    A. no drugs have been found to treat the disease

    B. the alternative treatment is not easily available to most people

    C. malaria has developed its ability to resist parasites

    D. nobody knows what will be the drug to treat the disease

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    B. The research finding about malaria

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    D. Malaria and its symptoms

    E. Children killed by malaria

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    76.           

    Malaria is a serious and ancient disease caused by one-celled Plasmodium parasites, and malaria is spread by the bite of infected Anopheles mosquitoes. The symptoms of malaria include periodic chills, fever, headache, and sweating. Complications affecting the kidneys, liver, brain, and blood can be fatal. Malaria is a major health problem in the tropics, where it afflicts up to 500 million people every year.

    77.

    Malaria is killing more people worldwide than previously thought, but the number of deaths has fallen rapidly as efforts to combat the disease have ramped up, according to a new research from the Institute for Health Metrics and Evaluation at the University of Washington.

    78.

    More than 1.2 million people died from malaria worldwide in 2010, nearly twice the number found in the most recent comprehensive study of the disease. The researchers say that deaths from malaria have been missed by previous studies because of the assumption that the disease mainly kills children under five. They found that more than 78,000 children aged 5 to 14, and more than 445,000 people aged 15 and older died from malaria in 2010, meaning that 42 percent of all malaria deaths were in people aged 5 and older.

    79.

    The study also found that while the overall number of malaria deaths is higher than earlier reports, the trend in malaria deaths has followed a similar downward pattern. Starting in 1985, malaria deaths grew every year before peaking in 2004 at 1.8 million deaths worldwide. Since then, the number of deaths has fallen annually and, between 2007 and 2010, the decline in deaths has been more than seven percent each year.

    80.

    Researchers say the biggest drivers of the decline in malaria deaths have been the scaleup of insecticide-treated bed nets and artemisinin-combination treatments. This has been accomplished through the advent of the Global Fund to Fight AIDS, Malaria & Tuberculosis in 2001 and the creation of organizations focused on fighting malaria, such as the World Health Organization's Roll Back Malaria, Malaria No More and Nothing But Nets. Overall funding for malaria efforts grew from less than 250 million U.S. dollars annually in 2001 to more than two billion in 2009, according to the researchers' latest estimates.

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