DNA ( Deoxyribonucleic acid ) is one of the most important discoveries in science. DNA is the plan for the human being , as a blueprint is the plan for building. DNA makes a person look the way he does. A  person's  DNA. comes  from a mixing of his parents' DNA. That's why a child looks like his parents. But, besides controlling things such as height and hair color, DNA can also give people diseases , Scientists are now studying DNA to cure diseases.

In the seventies, scientists developed a process called recombinant (重新组合) or RDNA. Although it sounds difficult to understand, RDNA simply means taking DNA from one animal or plant and putting it into another. By doing so, scientists can create new beings. In so doing, scientists can better understand DNA, especially what parts of DNA do . After they understand DNA, scientists can begin to cure diseases. Often, the new being created will itself be the cure.

Besides curing diseases, RDNA research can also do other things. For example, scientists in Japan have already created “super-trees”. Trees help humans, because they take CO₂, which poisons humans, from the air and turns it into oxygen, which lets humans breathe. “Super-trees” do this too, but do if much faster. As things such as cars and factories have already put much CO₂ in the area, “super-trees” are badly needed.

Unfortunately, there is serious danger in RDNA research. Scientists want to create animals to cure old diseases, but these new animals may also create new diseases. It will be a serious problem if the animals escape from the science laboratory and into nature. As these animals are not natural, they may let loose many new powerful diseases.

As a result, RDNA research will create many solutions (解决方案), but it will also create many problems.

67. From the passage, we can know that a boy looks like his parents because________

A. he is son of his parents

B. his parents' DNA decides his appearance

C. he has received DNA from his father or his mother

D. scientists have put some of his parents' DNA into him

68. What does the underlined expression “let loose” probably mean?

A. let... go free       B. get rid of        C. absorb          D. survive

69. What is the best title for the passage?

The DNA Research in Japan 

B. A New Way of DNA Research in Japan

C. The Causes and Effects of DNA Research

D. The Advantages And Disadvantages of RDNA

70. The following statements are true about RDNA research EXCEPT_____.

A. the research has been stopped because the created animals carry virus

B. “super-trees” might be widely planted around the world

C. scientists have not completely understood DNA

D. RDNA research will benefit human beings a lot

Human remains of ancient settlements will be reburied and lost to science under a law that threatens research into the history of humans in Britain, a group of leading archeologists (考古学家) says. In a letter addressed to the justice secretary, Ken Clarke, 40 archaeologists write of their “deep and widespread concern” about the issue. It centers on the law introduced by the Ministry of Justice in 2008 which requires all human remains unearthed in England and Wales to be reburied within two years, regardless of their age. The decision means scientists have too little time to study bones and other human remains of national and cultural significance.
“Your current requirement that all archaeologically unearthed human remains should be reburied, whether after a standard period of two years or a further special extension, is contrary to basic principles of archaeological and scientific research and of museum practice,” they write.
The law applies to any pieces of bone uncovered at around 400 dig sites, including the remains of 60 or so bodies found at Stonehenge in 2008 that date back to 3,000 BC. Archaeologists have been granted a temporary extension to give them more time, but eventuallly the bones will have to be returned to the ground.
The arrangements may result in the waste of future discoveries at sites such as Happisburgh in Norfolk, where digging is continuing after the discovery of stone tools made by early humans 950,000 years ago. If human remains were found at Happisburgh, they would be the oldest in northern Europe and the first indication of what this species was. Under the current practice of the law those remains would have to be reburied and effectively destroyed.
Before 2008, guidelines allowed for the proper preservation and study of bones of sufficient age and historical interest, while the Burial Act 1857 applied to more recent remains. The Ministry of Justice assured archaeologists two years ago that the law was temporary, but has so far failed to revise it.
Mike Parker Pearson, an archaeologist at Sheffield University, said: “Archaeologists have been extremely patient because we were led to believe the ministry was sorting out this problem, but we feel that we cannot wait any longer.”
The ministry has no guidelines on where or how remains should be reburied, or on what records should be kept.
【小题1】According to the passage, scientists are unhappy with the law mainly because ______.

 Human remains of ancient settlements will be reburied and lost to science under a law that threatens research into the history of humans in Britain, a group of leading archeologists (考古学家) says. In a letter addressed to the justice secretary, Ken Clarke, 40 archaeologists write of their “deep and widespread concern” about the issue. It centers on the law introduced by the Ministry of Justice in 2008 which requires all human remains unearthed in England and Wales to be reburied within two years, regardless of their age. The decision means scientists have too little time to study bones and other human remains of national and cultural significance.

   “Your current requirement that all archaeologically unearthed human remains should be reburied, whether after a standard period of two years or a further special extension, is contrary to basic principles of archaeological and scientific research and of museum practice,” they write.

   The law applies to any pieces of bone uncovered at around 400 dig sites, including the remains of 60 or so bodies found at Stonehenge in 2008 that date back to 3,000 BC. Archaeologists have been granted a temporary extension to give them more time, but eventuallly the bones will have to be returned to the ground.

   The arrangements may result in the waste of future discoveries at sites such as Happisburgh in Norfolk, where digging is continuing after the discovery of stone tools made by early humans 950,000 years ago. If human remains were found at Happisburgh, they would be the oldest in northern Europe and the first indication of what this species was. Under the current practice of the law those remains would have to be reburied and effectively destroyed.

   Before 2008, guidelines allowed for the proper preservation and study of bones of sufficient age and historical interest, while the Burial Act 1857 applied to more recent remains. The Ministry of Justice assured archaeologists two years ago that the law was temporary, but has so far failed to revise it.

   Mike Parker Pearson, an archaeologist at Sheffield University, said: “Archaeologists have been extremely patient because we were led to believe the ministry was sorting out this problem, but we feel that we cannot wait any longer.”

   The ministry has no guidelines on where or how remains should be reburied, or on what records should be kept.

1.According to the passage, scientists are unhappy with the law mainly because ______.

A. it is only a temporary measure on the human remains

B. it is unreasonable and thus destructive to scientific research

C. it was introduced by the government without their knowledge

D. it is vague about where and how to rebury human remains

2.Which of the following statements is true according to the passage?

A. Temporary extension of two years will guarantee scientists enough time.

B. Human remains of the oldest species were dug out at Happisburgh.

C. Human remains will have to be reburied despite the extension of time.

D. Scientists have been warned that the law can hardly be changed.

3.What can be inferred about the British law governing human remains?

A. The Ministry of Justice did not intend it to protect human remains.

B. The Burial Act 1857 only applied to remains uncovered before 1857.

C. The law on human remains hasn’t changed in recent decades.

D. The Ministry of Justice has not done enough about the law.

4.Which of the following might be the best title of the passage?

A. New discoveries should be reburied, the government demands.

B. Research time should be extended, scientists require.

C. Law on human remains needs thorough discussion, authorities say.

D. Law could bury ancient secrets for ever, archeologists warn.

Human remains of ancient settlements will be reburied and lost to science under a law that threatens research into the history of humans in Britain, a group of leading archeologists (考古学家) says. In a letter addressed to the justice secretary, Ken Clarke, 40 archaeologists write of their “deep and widespread concern” about the issue. It centers on the law introduced by the Ministry of Justice in 2008 which requires all human remains unearthed in England and Wales to be reburied within two years, regardless of their age. The decision means scientists have too little time to study bones and other human remains of national and cultural significance.
“Your current requirement that all archaeologically unearthed human remains should be reburied, whether after a standard period of two years or a further special extension, is contrary to basic principles of archaeological and scientific research and of museum practice,” they write.
The law applies to any pieces of bone uncovered at around 400 dig sites, including the remains of 60 or so bodies found at Stonehenge in 2008 that date back to 3,000 BC. Archaeologists have been granted a temporary extension to give them more time, but eventuallly the bones will have to be returned to the ground.
The arrangements may result in the waste of future discoveries at sites such as Happisburgh in Norfolk, where digging is continuing after the discovery of stone tools made by early humans 950,000 years ago. If human remains were found at Happisburgh, they would be the oldest in northern Europe and the first indication of what this species was. Under the current practice of the law those remains would have to be reburied and effectively destroyed.
Before 2008, guidelines allowed for the proper preservation and study of bones of sufficient age and historical interest, while the Burial Act 1857 applied to more recent remains. The Ministry of Justice assured archaeologists two years ago that the law was temporary, but has so far failed to revise it.
Mike Parker Pearson, an archaeologist at Sheffield University, said: “Archaeologists have been extremely patient because we were led to believe the ministry was sorting out this problem, but we feel that we cannot wait any longer.”
The ministry has no guidelines on where or how remains should be reburied, or on what records should be kept.

1. 1.

   According to the passage, scientists are unhappy with the law mainly because ______.

   1. A.
      it is only a temporary measure on the human remains
   2. B.
      it is unreasonable and thus destructive to scientific research
   3. C.
      it was introduced by the government without their knowledge
   4. D.
      it is vague about where and how to rebury human remains
2. 2.

   Which of the following statements is true according to the passage?

   1. A.
      Temporary extension of two years will guarantee scientists enough time.
   2. B.
      Human remains of the oldest species were dug out at Happisburgh.
   3. C.
      Human remains will have to be reburied despite the extension of time.
   4. D.
      Scientists have been warned that the law can hardly be changed.
3. 3.

   What can be inferred about the British law governing human remains?

   1. A.
      The Ministry of Justice did not intend it to protect human remains.
   2. B.
      The Burial Act 1857 only applied to remains uncovered before 1857.
   3. C.
      The law on human remains hasn’t changed in recent decades.
   4. D.
      The Ministry of Justice has not done enough about the law.
4. 4.

   Which of the following might be the best title of the passage?

   1. A.
      New discoveries should be reburied, the government demands.
   2. B.
      Research time should be extended, scientists require.
   3. C.
      Law on human remains needs thorough discussion, authorities say.
   4. D.
      Law could bury ancient secrets for ever, archeologists warn.