A new study finds that the animal known as man’s best friend can also be a good friend to the heart. Researchers in California say they have found that even just a short visit with a dog helped ease the worries of heart patients.               

The study divided the patients into three groups. In Group A, a dog and a person visited each patient for twelve minutes. Patients in Group B received just a human visitor for twelve minutes. And members of Group C received no visitor, human or canine(犬的).

The dogs would lie on the hospital bed so the heart patients could touch them. The researchers say some patients immediately smiled and talked to the dog and the human visitor. Dogs, in her words, “make people happier, calmer and feel more loved.”

The researchers examined the patients before, during and after the visits. They measured stress levels based on blood flow and heart activity. They say they found a twenty-four percent decrease in the group visited by both a dog and a person. They reported a ten percent decrease in the group visited by a person only. There was no change in the patients without any visit. These patients, however, did have an increase in their production of the hormone epinephrine (epinephrine肾上腺素). The body produces epinephrine during times of stress.

The increase was an average of seven percent. But the study found that patients who spent time with a dog had a seventeen percent drop in their levels of epinephrine. Patients visited by a human but not a dog also had a decrease, but only two percent.

The author believes that _______.  

   A. the dog can take the place of most medicines

   B. the dog is the most popular pet for man

   C. the findings of the research cannot be trusted

   D. visits by a human work better than visits by a dog

Which of the following best shows the stress level changes in the groups of patients? BACC

From the research findings we may conclude that _______.

A. the less the body produces epinephrine, the better

B. the longer a visit lasts, the happier the patient should be

C. the patients enjoyed the dogs’ company more than the human visitors’

D. it’s impossible for heart patients to recover without dogs’ visits

Which of the following is the best title for the passage?

  A. Worried Heart Patients               B. Epinephrine and Stress

  C. Good Friend to the Heart             D. Three Groups of Patients

    A recent announcement by scientists that they have successfully cloned the first human embryo has caused much debate and has shocked many people around the world. On the one hand，some scientists point out that if you clone an embryo，you can produce valuable tissues(组织）and organs that could be used to save human lives. On the other hand，many people，including some scientists, disagree and fear that if mankind interferes with（干涉）nature in this way，they may be on their way to producing a real-life Frankenstein’s monster.

    Cloning is producing an exact copy of a plant or an animal using its cells. The first mammal to be cloned successfully from an adult cell was Dolly the sheep. She was born in 1996 and died in early 2003，at a much younger age than normal. When she was born，many people were angry because they thought cloning would create more disease in the animal world. However，in general the scientists were praised for their wonderful scientific breakthrough.

    The Scottish scientist who created Dolly，Ian Wilmut，is shocked that some scientists are now considering cloning human beings. Although he researches cloning，his intention has never been to create copies of humans. Instead，he thinks research efforts should concentrate on creating new tissues and organs that could eventually be used to cure diseases like cancer. However，some people consider that cloning human embryos with the intention of destroying them shows no respect for human life.

    While cloning human embryos is illegal in many countries，some scientists are already pushing ahead with research so as to deliver a cloned human baby. Severino Antinori，an Italian doctor，is one of the leaders in this kind of research. He has declared that he wants to be the first to clone a human being.

    In China，scientists have focused their efforts on cloning animals，as well as stern cells to be used in medical research. China has succeeded in producing clones of cows and goats，and continues to research ways in which cloning can benefit mankind.

51. Which of the following statements about cloning is TRUE according to the passage?

A. Cloning technology can only be applied to animals.

B. A cloned animal can live longer than a normal one.

C. People all over the world are happy about the birth of Dolly.

D. Cloning can produce valuable tissues and organs to cure human diseases.

52. The reasons why people are anti-cloning include the following EXCEPT that_______.

A. cloning may produce a real-life Frankenstein’s monster

B. cloning might create more disease in the animal world

C. cloning can’t help those who want to clone their dead children

D. cloning human embryos shows no respect for human life

53. Who is in favor of cloning human beings?

A. Ian Wilmut.        B. Severino Antinori.

C. The author.        D. The Chinese scientists.

54. What can be inferred from the last two paragraphs?

A. If we interfere with nature, we will change the world to be what we want.

B. It is impossible to clone babies for women who cannot have ones.

C. Cloning human beings is illegal in many countries，so no scientists want to do so.

D. Whether cloning human embryos is legal or not remains a matter of debate.

A certain student passed all his examinations. Then he went to college to  16  his studies. There he wrote down his  17  for a course (课程) in English, but after the first  18  , he didn’t go to it any more.
The English lecturer  19  this student was always absent (缺席的) and thought he had  20  another course, so he was   21  when he saw the boy’s name on the list of students who wanted to take the English  22  at the end of this year.
The lecturer had  23  a difficult paper, which followed his  24  closely, and he was eager (热切的) to see  25  this student would answer the questions. He  26  the boy’s answers would be very bad, but when they  27  him and he examined them  28  , he was able to find only one small mistake in them. As this surprised him greatly, he  29  the paper repeatedly but still couldn’t find more than one mistake, so he  30  for the student to question him about it.
When he came and sat down, the lecturer asked him, “I  31  you came to my first lecture and you’ve been absent from all the others. But I’ve examined your  32  carefully and I’ve found only one small mistake in it. I’m curious (好奇的) to know your  33  .”
“I’m very  34  about that mistake,” answered the student. “After the examination, I 35  what I should have done. I would not have made that mistake if I had not been confused by your first lecture.”
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A certain student passed all his examinations. Then he went to college to  21  his studies. There he wrote down his  22 for a course in English, but after the first 23 , he didn’t go to it any more.
The English lecturer 24_this student was always absent (缺席的) and thought he had  25_to another course, so he was  26  when he saw the boy’s name on the list of students who wanted to take the English  27at the end of this year.
The lecturer had  28 a difficult paper, which followed his  29 closely, and he was eager (热切的) to see  30 this student would answer the questions. He  31__the boy’s answers would be very bad, but when they  32 him and he examined them  33 , he was able to find only one small mistake in them. As this surprised him greatly, he  34 the paper repeatedly but still couldn’t find more than one mistake, so he  35 for the student to question him about it.
When he came and sat down, the lecturer asked him, “I  36 you came to my first lecture and you’ve been absent from all the others. But I’ve examined your  37 carefully and I’ve found only one small mistake in it. I’m curious (好奇的) to know your  38 .”
“I’m very  39  about that mistake,” answered the student. “After the examination, I  40  what I should have done. I would not have made that mistake if I had not been confused by your first lecture.” 

A few weeks ago, our dog, which we had kept for more than ten years, had to be put down. First, a tumor on her stomach got worse, and she was very   36 . Then, the pain in her back got so bad that sometimes she   37  lie down in the middle of a walk and couldn't take another   38 .
When I first found out, l was very sad and cried a lot. She was more like a sister to me than a   39 .But I was also angry at my stepfather,Steve,who told us the  40  a week after it happened. He   41  because he didn' t want to worry us, and he didn't want me to get depressed(抑郁的) and fail my exams. I just thought she was   42  at the animals' hospital.
I think you know all the   43  that went through my head: She was my dog！Why didn't he tell us earlier? I didn't even get to say goodbye.
People in my family have a   44  of keeping things from me to protect me, such as only telling me that my aunt had cancer   45  she had already improved health. All I could think was: Not again !
I   46  to my mum, and she said， “I know. I'm   47  , too.” I opened my mouth to shout. And then she added, “I'm so angry with Steve that he had to   48  through all this on his own.”Hearing my mum's words, I shut up my mouth. I had been so   49  on myself. I hadn't thought about   50  Steve was going through. That dog was his baby. He'd had her for longer than he'd had us—and he had to make the decision to   51  her life, and then kept in silence for an entire   52 . All my anger melted away, and all I felt was   53 .
It makes me realize that we focus so much on ourselves that we   54  the pain of others. At that moment, my mum's words were an incredible   55  that I'll never forget.