46. The author begins his article with Edmund Burke's words to_____.
    
    A. call on scientists to take some actions.
    
    B. criticize the misguided cause of animal rights.
    
    C. warn of the doom of biomedical research.
    
    D. show the triumph of the animal rights movement.
    
    47. Misled people tend to think that using an animal in research is_____.
    
    A. cruel but natural.
    
    B. inhuman and unacceptable.
    
    C. inevitable but vicious.
    
    D. pointless and wasteful.
    
    48. The example of the grandmotherly woman is used to show the public's_____.
    
    A. discontent with animal research.
    
    B. ignorance about medical science.
    
    C. indifference to epidemics.
    
    D. anxiety about animal rights.
    
    49. The author believes that, in face of the challenge from animal rights advocates, scientists should_____.
    
    A. communicate more with the public.
    
    B. employ hi-tech means in research.
    
    C. feel no shame for their cause.
    
    D. strive to develop new cures.
    
    50. From the text we learn that Stephen Cooper is_____.
    
    A. a well-known humanist.
    
    B. a medical practitioner.
    
    C. an enthusiast in animal rights.
    
    D. a supporter of animal research. 

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